If you are living in a damp, cold home, staying warm can be a real struggle without blasting the heating all day. While we previously recommended hand warmers and room heaters, sometimes you need something that delivers long-lasting, cosy heat exactly where you need it. This is where hot water bottles shine. They are simple, reliable, and perfect for warming cold hands, feet, or even your back.
Hot water bottles work by holding heated water inside a thick, insulated cover. The warmth slowly radiates from the bottle, providing steady, targeted heat for hours. Unlike portable heaters that warm the entire room, a hot water bottle keeps you cozy without raising your energy bills or making the air stuffy. The heat can relax tense muscles, soothe aches, and make even damp, chilly rooms feel much more comfortable.
Unfortunately, not every bottle labelled as a hot water bottle delivers consistent warmth or lasts long enough to be truly useful. Some are thin, lose heat quickly, or don’t have covers that protect your skin from direct contact with hot rubber. That’s why it’s worth choosing ones that are well-made, insulated, and comfortable to hold.
In this guide, we review the best hot water bottles that can make a real difference in a damp, cold home, giving you hours of soothing heat exactly where you need it without any hassle
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Top 10 Best Hot Water Bottles in The UK Compared
| Goal | Recommended Brand | Why it Wins |
| Deepest Warmth | BOLEi | 3mm thick walls and luxury insulation. |
| Best Coverage | RAM ONLINE (Long) | 72cm length for full-spine relief. |
| Best Value | Jsdoin | Premium faux fur feel at a budget price point. |
1. BOLEi Hot Water Bottle with Luxury Cosy Faux Fur Cover – 2L
Best for: Delivering intense, concentrated heat to thaw out frozen limbs and pre-warm cold bedding.
The BOLEi Hot Water Bottle with Luxury Cosy Faux Fur Cover serves as a high-capacity thermal reservoir, holding 2 litres of water to provide steady, radiating warmth. Its primary job is to deliver direct heat to the body, bypassing the need to warm an entire room.
The model features a thick 3mm rubber construction that acts as a heavy-duty heat sink, paired with a plush faux fur cover to regulate the temperature and prevent skin irritation. We like it because it is designed with integrated hand-warmer pockets, which allow you to tuck your hands directly against the heat source for immediate relief from the bite of a chilly room.
Key Features
- 2-Litre Capacity: Provides a massive surface area of heat, perfect for warming large sections of a bed or sofa.
- Thick 3mm Rubber Walls: High-density material ensures the water stays hot for up to five hours without rapid cooling.
- Plush Faux Fur Sleeve: A soft, breathable cover that creates a comfortable barrier between the skin and the hot rubber.
- Integrated Hand Muffs: Built-in slots that let you slide your hands inside for 360-degree warmth.
- Wide 2.5cm Safety Mouth: A larger opening that makes the filling process fast and reduces the risk of hot water splashing.
Pros
- Offers deep, penetrating warmth that helps relax tense muscles and soothe aches.
- Extremely cost-effective, requiring only a single kettle boil for a full evening of heat.
- The thick cover prevents the bottle from feeling clammy or sticky against the skin.
- Versatile enough to be used as a targeted foot warmer or a heated backrest.
Cons
- The 2kg weight, when filled, can be heavy for some users to carry.
- New rubber has a distinct scent that takes a few days of use to fade away.
Why we recommend BOLEi Hot Water Bottle with Luxury Cosy Faux Fur Cover
We recommend this because the hand-warmer pockets and 2-litre capacity offer a practical, no-fuss way to stay warm. It is a durable, high-performance tool for staying comfortable.
Check prices on Amazon: BOLEi Hot Water Bottle with Luxury Cosy Faux Fur Cover – 2L
2. Cassandra Hot Water Bottle with Ribbed Surface Both Sides
Best for: Those seeking a reliable, no-frills heat source that provides gentle, sustained warmth against the skin.
The Cassandra Hot Water Bottle with Ribbed Surface Both Sides focuses on a traditional approach to personal warmth. Unlike smooth bottles that can feel too hot or sticky, this model features a ribbed texture on both faces. These ridges create small air gaps between the rubber and your body, allowing the 1.8 litres of heat to radiate more evenly.
It acts as a dependable thermal companion for warming up cold feet or easing muscle tension. And since it is handmade with extra-thick rubber walls, it retains its temperature effectively, making it a solid choice for maintaining comfort throughout a cold evening.
Key Features
- Double-Sided Ribbed Texture: Designed to provide a buffered heat effect, preventing the bottle from feeling uncomfortably hot against the skin.
- 1.6mm Wall Thickness: Exceeds standard safety requirements to ensure the bottle is durable and retains heat for longer periods.
- Washer-less Stopper Design: Features a revolutionised seal that doesn’t rely on a separate rubber washer, reducing the risk of leaks over time.
- 1.8-Litre Capacity: Offers a substantial volume of hot water, providing consistent warmth for several hours.
- Tested Safety Standards: Manufactured to exceed BS1970/2012, with each unit pressure-tested for maximum reliability.
Pros
- The ribbed surface prevents the bottle from slipping and makes it more comfortable to hold.
- Comes with a 5-year manufacturer guarantee, offering much better peace of mind than generic brands.
- Extremely affordable and cost-effective for targeted warmth compared to electric alternatives.
- The washer-less cap means one less part to lose or replace as the bottle ages.
Cons
- You cannot choose the colour, as it is sent based on current stock availability.
- Since it is sold without a cover, you may need to wrap it in a towel or buy a separate sleeve.
Why we recommend Cassandra Hot Water Bottle
We recommend this because it is a sturdy, dependable classic. The extra wall thickness and the 5-year guarantee make it a very safe and long-lasting option for everyday warmth.
Check prices on Amazon: Cassandra Hot Water Bottle with Ribbed Surface Both Sides
3. Jsdoin Hot Water Bottle with Luxury Cosy Faux Fur Cover
Best for: Budget-friendly, all-night warmth with a high-end feel.
If you liked the luxury feel of the BOLEi but want something a bit more wallet-friendly, the Jsdoin Hot Water Bottle is a fantastic alternative. It delivers that same 2L capacity, which is essential for keeping a bed warm from top to bottom.
The faux rabbit fur cover is incredibly plush, making it much more comfortable to snuggle with than the bare rubber of the Cassandra model. It’s a simple, effective way to get hours of heat for your feet or back without spending a fortune on electric heaters.
Key Features
- Anti-Aging Natural Rubber: Crafted from high-quality rubber designed to resist wear and tear over multiple winters.
- Plush Faux Rabbit Fur: The thick, grey cover provides a soft barrier that releases heat slowly and safely.
- Large 2L Capacity: Holds a substantial amount of water to ensure the heat lasts for several hours.
- Dual-Purpose Use: Works perfectly as a warm compress for aches or as a cold pack for swelling.
- Ergonomic Design: Shaped to sit comfortably against the neck, shoulders, or lower back for targeted relief.
Pros
- The cover feels much more expensive than the price tag suggests.
- It’s excellent at maintaining temperature, staying warm well into the early hours of the morning.
- The 2L size is perfect for pre-heating a cold, damp bed before you climb in.
- Leak-proof performance provides great peace of mind while you sleep.
Cons
- The instructions recommend water at 80°C, so you’ll need to let your kettle cool for a minute.
- The grey cover shows dust quite easily, though it is luckily easy to wash.
Why we recommend the Jsdoin Hot Water Bottle
We recommend this one because it offers a premium, cozy experience at a very accessible price point, making warmth affordable for everyone.
Check prices on Amazon: Jsdoin Hot Water Bottle with Luxury Cosy Faux Fur Cover – 2L
4. KEPLIN Hot Water Bottle 2L with Soft Faux Fur Cover
Best for: Rapidly thawing out frozen fingers and toes after coming in from the cold.
The KEPLIN Hot Water Bottle is another heavy hitter when it comes to pure, cozy relief. Similar to the BOLEi we started with, this one features a dual-opening cover that acts like a heated muff for your hands.
It’s exactly what you need when you’ve just walked into a chilly house, and your circulation hasn’t quite caught up yet. The 2L rubber core provides a massive amount of thermal mass, meaning it doesn’t just get warm; it stays hot enough to act as a personal radiator for your lap or feet for hours on end.
Key Features
- Dual-Hand Openings: The cover lets you slide both hands inside to sandwich them against the heat source.
- Ultra-Soft Faux Rabbit Fur: A thick, polyester-based fur that traps heat and feels incredibly soft against the skin.
- Anti-Aging Natural Rubber: High-quality construction designed to withstand the stress of daily boiling water refills.
- Large 2L Capacity: Provides a broad surface area of warmth, perfect for pre-heating your bed.
- Lightweight Empty Weight: At just 350g when empty, it’s easy to handle and fill even if your hands are stiff from the cold.
Pros
- The two-tone grey design looks modern and fits into any living room decor.
- It’s brilliant for soothing joint stiffness or muscle aches caused by a cold environment.
- The leak-proof seal is very reliable, letting you toss it under the covers without worry.
- Thick cover insulation prevents that initial “too hot” shock when you first fill it up.
Cons
- Like most 2L bottles, it can be a bit heavy for some when filled to the brim.
- You need to be careful not to get the fluffy cover wet while filling, as it takes a while to dry.
Why we recommend the KEPLIN Hot Water Bottle
We recommend the KEPLIN Hot Water Bottle because of that “hand-muff” design. It’s one of the fastest ways to get warmth back into your body when the room temperature drops.
Check prices on Amazon: KEPLIN Hot Water Bottle 2L with Soft Faux Fur Cover
5. RAM ONLINE Extra Long Grey Hot Water Bottle 72CM
Best for: Full-body warmth and soothing long-stretch muscle pain, like lower back aches.
Sometimes a standard square bottle just doesn’t cut it, especially when you’re trying to warm up a large area of a cold bed. The RAM ONLINE Extra Long Hot Water Bottle is a massive 72cm long, which is a total game-changer for staying warm. You can wrap it around your waist, drape it over your shoulders, or lay it down the length of your legs.
While the KEPLIN model we just discussed is perfect for your hands, this long version is what you want for full-body comfort. You can basically think of it as a wearable radiator that keeps the chill off your entire spine at once.
Key Features
- 72cm Extra-Long Reach: The elongated shape allows you to target your neck, back, and hips all at the same time.
- 2L High Capacity: Despite being long and thin, it still holds a full 2 litres of water for sustained heat.
- Soft Fleecy Cover: Comes with a snuggly grey cover that feels gentle against the skin and prevents direct rubber contact.
- PVC-Free Rubber: Made from natural rubber, ensuring it stays flexible and moves with your body.
- Multipurpose Relief: Designed specifically to help with arthritis, stiff necks, and menstrual cramps by covering more surface area.
Pros
- It’s the best shape for pre-warming the entire length of your spot in bed.
- You can actually tie it around your waist to stay warm while moving around the house.
- It stays hot for a surprisingly long time despite its unusual shape.
- Much more effective for lower back pain than a standard small bottle.
Cons
- Because it’s so long, it can be a bit awkward to fill at a shallow kitchen sink.
- It takes up more storage space than a traditional bottle when not in use.
Why we recommend the RAM ONLINE Extra Long Hot Water Bottle
We love this for its sheer versatility. Being able to wrap the heat around your body makes it much easier to stay comfortable in a cold room.
Check prices on Amazon: RAM ONLINE Extra Long Grey Hot Water Bottle – 72CM
6. Revitale Luxury Cosy Hot Water Bottle 2 Litre
Best for: Consistent, all-night warmth and high-quality heat retention in drafty bedrooms.
The Revitale Luxury Cosy Hot Water Bottle is a staple for a reason. While the RAM ONLINE extra-long version is great for wrapping around your body, this classic 2L bottle focuses on high-density rubber that holds onto heat much longer than cheaper alternatives.
It’s a reliable pick for those nights when the room temperature feels like it’s plummeting. The slate grey faux fur cover is thick and insulating, ensuring the bottle doesn’t just start hot and cool down quickly, but instead provides a steady, soothing warmth that lasts until morning.
Key Features
- High Rubber Content: Built with thick, high-quality natural rubber that exceeds British Standard BS1970:2012 for safety.
- Single Ribbed Texture: The surface design under the cover helps regulate heat so it doesn’t feel too intense against your skin.
- 2 Litre Capacity: Offers a large surface area of warmth, ideal for warming up a cold, damp bed before sleep.
- Leak-Resistant Screw Cap: Features a secure, tight-sealing stopper that prevents any messy or dangerous spills in bed.
- Removable Faux Fur Cover: The slate grey sleeve is soft to the touch and easy to remove for hand washing.
Pros
- It stays warm for hours, making it perfect for keeping your feet toasted through a long night.
- The thick rubber construction feels much more durable and substantial than budget models.
- It’s a trusted UK brand with a high focus on safety and rigorous quality testing.
- The single ribbed side allows for a more “breathable” heat release.
Cons
- The cover is hand-wash only, which can be a bit of a chore compared to machine-washable ones.
- Like most high-quality rubber, there is a slight “new” scent when first filled.
Why we recommend the Revitale Luxury Cosy Hot Water Bottle
We recommend the Revitale Luxury Cosy Hot Water Bottle because of its reliable heat retention. It’s a sturdy, no-nonsense winter essential that delivers exactly what it promises.
Check prices on Amazon: Revitale Luxury Cosy Hot Water Bottle 2 Litre
7. RAM ONLINE Large 2L Hot Water Bottle with Soft Fleece Cover
Best for: No-nonsense, affordable warmth to keep the chill off your lap or feet.
If you found the 72cm RAM ONLINE bottle a bit too long for your needs, this standard-shaped RAM ONLINE Large 2L Hot Water Bottle is the practical, compact alternative. It’s built for those who just want a reliable heat source without a high price tag.
It has a soft fleece cover that is designed to be durable and functional, offering a cozy barrier that helps the heat linger. We find this water bottle especially good for keeping the damp cold at bay while you’re working at a desk or tucked up on the sofa, providing a steady stream of warmth right where you need it most.
Key Features
- Standard 2L Capacity: Provides a large surface area of heat, perfect for warming up cold extremities or a chilly bed.
- Durable Fleece Material: The cover is designed to withstand daily use while keeping the hot rubber away from direct skin contact.
- Natural Rubber Core: Offers great flexibility, allowing the bottle to contour to your stomach or lower back easily.
- Latex-Free Construction: A safer choice for those with sensitivities or allergies to traditional latex materials.
- Pressure-Tested Design: Manufactured to handle the stresses of regular heating and cooling throughout the winter.
Pros
- It’s incredibly affordable, making it easy to stock up on a few for different rooms.
- The fleece cover is thin enough to let plenty of heat through but thick enough to prevent burns.
- Extremely easy to handle and fill compared to more awkwardly shaped specialty bottles.
- The 2L size is the “gold standard” for keeping warmth trapped under a duvet for hours.
Cons
- You can’t pick the specific pattern; a random design is dispatched based on current stock.
- The fleece isn’t quite as thick or “luxury” as the faux fur models we’ve seen.
Why we recommend the RAM ONLINE Large 2L Hot Water Bottle
We recommend it because it’s a budget-friendly essential. It’s a straightforward way to stay warm and comfortable during a long UK winter without any unnecessary frills.
Check prices on Amazon: RAM ONLINE Large 2L Hot Water Bottle with Soft Fleece Cover
8. Jsdoin Extra Long Lilac Hot Water Bottle with Super Soft Cover 2L
Best for: Full-body snuggling and warming the entire length of your spine or legs at once.
If you liked the plush feel of the Jsdoin Hot Water Bottle with Luxury Cosy Faux Fur Cover we looked at earlier, but wished it could cover more ground, this 74cm version is the answer. It is essentially a “stretched out” edition of that same cozy favourite.
Instead of a compact square, you get a heated bolster that you can drape over your shoulders or wrap around your waist like a warm hug. It uses that same high-quality Jsdoin faux fur that stays toasted and dry, making it a huge upgrade for those evenings when a standard bottle just doesn’t provide enough coverage.
Key Features
- 74cm Extended Length: The elongated design is specifically made to wrap around the body or stretch across the width of a bed.
- Plush Faux Fur Cover: Uses the same luxury material as the standard Jsdoin model to trap heat and provide a soft touch.
- Flexible Rubber Core: High-quality rubber that bends easily, making it comfortable to use as a wearable heat source.
- Tightly Screwable Lid: A robust, leak-free design that ensures you stay dry even when the bottle is bent or moved.
- 2L Thermal Volume: Despite the thin profile, it still holds a full 2 litres, giving it plenty of “staying power” for hours of heat.
Pros
- It’s the ultimate “snuggle” bottle for bed, warming you from your toes to your chest.
- The pom-pom tie detail adds a nice touch of style if you’re giving it as a gift.
- Much more effective for tackling long-area muscle pain than the smaller Jsdoin version.
- It can be filled with icy water in the summer to act as a cooling body bolster.
Cons
- It requires a bit more patience to fill safely since the neck is long and narrow.
- Not as easy to carry around as the compact, square-shaped Jsdoin model.
Why we recommend the Jsdoin Extra Long Lilac Hot Water Bottle
We recommend this because it takes everything great about the standard Jsdoin bottle and scales it up. The extra length makes it much more versatile for full-body warmth.
Check prices on Amazon: Jsdoin Extra Long Lilac Hot Water Bottle – 2L
9. MUPAS Hot Water Bottle with Fleece Cover
Best for: Keeping hands toasted while relaxing on the sofa or working in a chilly room.
You will appreciate the MUPAS Hot Water Bottle for its practical approach to beating the chill. It mirrors the hand-warmer idea seen in the BOLEi model but uses a sleeker, low-profile polar fleece instead of thick faux fur. This material is excellent for those who want a cover that is easy to manage and clean while still providing that essential “muff” style pocket for frozen fingers.
It’s a very functional tool for anyone whose hands get stiff while sitting still, providing a focused heat source that stays warm for hours thanks to its high-quality natural rubber core.
Key Features
- Integrated Hand Pocket: The cover features two openings that allow you to tuck your hands inside to escape the cold air.
- Polar Fleece Insulation: Soft polar fleece material is designed to release heat evenly and steadily over a long period.
- BS1970:2012 Certified: Fully tested to meet UK safety standards, ensuring the rubber and seams are completely leak-proof.
- Machine Washable Cover: This fleece sleeve is easy to maintain and can be cleaned in a standard 30°C wash.
- Large 2L Volume: The generous capacity provides enough thermal mass to stay warm well into the night.
Pros
- The hand pocket design is a total lifesaver for anyone with poor circulation or cold fingers.
- Polar fleece is very durable and doesn’t “shed” as some of the fluffier faux fur covers can.
- It’s lightweight and flexible, making it easy to drape over your stomach or shoulders.
- Filling is straightforward and safe thanks to the wide-mouth design.
Cons
- Polar fleece doesn’t feel quite as “luxurious” as the thicker rabbit-style fur covers.
- The bottle can feel slightly stiff if you overfill it past the recommended two-thirds mark.
Why we recommend the MUPAS Hot Water Bottle
We recommend the MUPAS Hot Water Bottle because it’s a smart, functional design. The combination of a washable fleece cover and the built-in hand warmer makes it a very reliable daily companion.
Check prices on Amazon: MUPAS Hot Water Bottle with Fleece Cover
10. Heat Hug Hot Water Bottle with Cover (2L)
Best for: Intelligently managing the intensity of heat for sensitive areas like the stomach or back.
The Heat Hug Hot Water Bottle stands out as a premium choice because it solves the common problem of a bottle being either too hot or not warm enough. Much like the BOLEi and MUPAS models, it features clever hand pockets, but it takes things further with a dual-sided cover.
One side uses thick faux fur for a gentler, muffled warmth, while the other uses thin velvet for when you need a more intense, direct heat. It’s a thoughtful design that makes it the most versatile bottle on this list for dealing with specific discomforts like period pain or muscle stiffness.
Key Features
- Two-Sided Heat Control: Features thick faux fur on one side and thin luxurious velvet on the other for adjustable temperature.
- Fur-Lined Hand Pockets: Soft velvet pockets lined with fur keep your hands toasted while the bottle warms your core.
- Large 2L Capacity: Holds a significant volume of water to ensure the heat remains consistent for several hours.
- Color-Coded Zip Design: Makes it incredibly easy to remove the natural rubber bottle for cleaning or filling.
- Safety Certified: Manufactured to high standards, ensuring it is BPA, Latex, and PVC free for peace of mind.
Pros
- Being able to flip the bottle to change the heat intensity is a brilliant, practical feature.
- The velvet and fur materials feel much more high-end than a standard fleece or rubber bottle.
- Excellent for soothing stomach cramps or endometriosis pain thanks to the targeted heat sides.
- The zip closure is much more secure and easier to use than traditional fold-over covers.
Cons
- It is at a much higher price point compared to budget options like the RAM ONLINE bottles.
- The cover is hand-wash only to maintain the quality of the velvet and faux fur.
Why we recommend the Heat Hug Hot Water Bottle
We recommend the Heat Hug Hot Water Bottle because it offers total control. The dual-fabric design is a smart way to tailor your comfort level exactly to what your body needs at that moment.
Check prices on Amazon: Heat Hug Hot Water Bottle with Cover (2L)
The Homeowner’s Buying Guide to Hot Water Bottles
A hot water bottle is more than just a winter accessory; it is a tool for managing home comfort and energy costs. To get the most out of your purchase, focus on these four technical pillars.
1. Thermal Mass and Retention
The effectiveness of a bottle depends on how long it can hold heat.
- Rubber Density: Higher rubber content, like that found in the Revitale Luxury Cosy or Cassandra models, retains heat significantly longer than synthetic PVC versions.
- The 3mm Rule: For extreme cold or damp rooms, look for extra-thick walls. The BOLEi Hot Water Bottle uses 3mm thick rubber, which acts as a heavy-duty battery for heat, releasing it slowly over 6–8 hours rather than all at once.
2. Shape vs. Function
The shape you choose should depend on where you feel the cold most:
- Classic 2L Square: Best for “stationary” warmth, such as keeping your feet toasted under a desk or at the bottom of the bed.
- Extra Long (72cm): Specialised models like the RAM ONLINE Extra Long or Jsdoin Lilac are superior for pre-warming a damp mattress or wrapping around your lower back to treat sciatica and stiffness.
- Hand-Pocket Designs: If your primary struggle is poor circulation, models like the MUPAS or KEPLIN allow you to “sandwich” your hands against the heat, which thaws frozen fingers faster than resting them on top of a standard cover.
3. Heat Intensity Control
Direct heat can sometimes be too aggressive, especially for sensitive areas like the stomach.
- Ribbed vs. Smooth: A ribbed surface (like the Cassandra) creates air gaps between the rubber and the cover, resulting in a gentler, more consistent heat.
- Dual-Fabric Covers: Premium options like the Heat Hug provide a “high/low” setting—use the velvet side for intense heat during cramps and the faux fur side for a lingering, gentle warmth while sleeping.
4. Safety and Lifespan
- British Standard BS 1970:2012: This is non-negotiable. It ensures the stopper won’t leak and the seams won’t burst under pressure. All models on this list, including the budget-friendly RAM ONLINE Large 2L, meet or exceed these safety benchmarks.
- The “Expel Air” Technique: To prevent the bottle from bursting, always lay it flat after filling to squeeze out the “dead air” until water reaches the neck before tightening the stopper.
Common Questions About Hot Water Bottles In the UK Answered
What are the benefits of using a hot water bottle?
Using a BOLEi or Heat Hug hot water bottle provides localised heat therapy that increases blood flow to soothe muscle aches, period cramps, and joint stiffness. Beyond pain relief, they are an eco-friendly way to “heat the human, not the home,” helping homeowners lower energy bills by staying warm without raising the thermostat.
How long does a hot water bottle stay warm?
A standard 2L bottle typically stays warm for 6 to 8 hours when placed under a duvet. Factors like the thickness of the rubber (such as the 3mm walls on the BOLEi) and the type of insulation provided by the cover significantly extend heat retention.
How to correctly use a hot water bottle?
1. Cool the water: Let boiling water sit for 5 minutes (aim for 80°C).
2. Fill carefully: Hold the bottle by the neck and fill to two-thirds capacity.
3. Expel air: Gently lower the bottle onto a flat surface until water appears at the opening to remove trapped air.
4. Seal: Screw the stopper finger-tight and check for leaks.
Is it okay to use a hot water bottle every day?
Yes, it is safe for daily use, provided you inspect the rubber for signs of wear or perishing. However, continuous daily use can cause the rubber to degrade faster; brands like Cassandra offer a 5-year guarantee to account for frequent use.
Do I put boiling water in a hot water bottle?
No. Never use boiling water straight from the kettle. Boiling water can damage the internal seams of the rubber and increase the risk of the bottle bursting. Always use hot, but not boiling, water.
Where is the best place to put a hot water bottle?
For maximum warmth, place it at the foot of the bed under the covers 15 minutes before sleep. For pain relief, place it directly on the affected area (stomach or back), but always ensure a cover, like the Jsdoin faux fur, is between the bottle and your skin.
What not to do with a hot water bottle?
Do not sit or lie on it: Excessive pressure can cause the bottle to burst.
Do not apply directly to skin: Always use a cover to prevent “hot bottle burns.”
Do not use a microwave: These bottles are designed for kettle-heated water only.
Do not use domestic hot water: Water from a boiler system often contains minerals that can deteriorate the rubber from the inside out.
