If you want to try this, it's best not to use the bottle for hot water ever again and keep it as a cold compression only. Before filling traditional bottles, check the rubber for any obvious signs of damage and discard immediately if you find any tears or cracks. The inner bottle is made from thermoplastic, while the zippable covers are all 100% faux fur, which can be machine washed. A heat warmer and power bank in one, the Zippo Heatbank will make a great addition to your pocket this winter, and it comes in a lot cheaper than a pair of heated gloves. by 25cm – about the size of an outstretched hand – and has a 750ml capacity, although you’ll only fill it with about 250ml of water so one kettle’s worth will usually fill all three.

It also doubles as an ice pack in hot weather, too: Team GB was even sporting them at the Tokyo Olympics. This indulgent faux fur water bottle is designed to be very soft and cosy - ideal for snuggling up to. Air-activated hand warmers - These tend to be disposable in nature and begin heating up when exposed to air (or removed from the packet). We particularly like the little pocket on the outside of the cover to tuck away the drawstring when not in use.They may not be the most environmentally-friendly choice, but if you need something that will work instantly and stay hot for ages, these Hot Hands Instant Hand Warmers are an excellent choice. Fans of the old-school traditional bottle can still fill theirs from the kitchen kettle – but they can also opt for a miniature-sized version to keep chilly hands warm in pockets, or place them on particular areas of the body. When filling the bottle, pour carefully to avoid spillages – upright while in the sink is the most sensible method.

They’re great for tucking into the pockets of one the best winter coats for women when you're out and about, or they can be used at home if your budget doesn't quite stretch to a heated throw. It may sound obvious, but there’s still a bit of science involved when it comes to the choice of traditional hot water bottle materials. Heat releases slowly through the thinner side, leaving the other thickly insulated side to prevent temperature loss, so it’s purely for hugging. Whether you’re sitting at the desk all day or in front of the telly, these foot warmers will keep your tootsies toasty warm. However, because it's made from natural rubber that can get quite hot, it's worth getting an outer cover for it.We work hard to provide honest and independent advice you can trust and we spend hours scouring the Mumsnet forums and online bestseller lists to find products that real parents rate.