While reviews suggest there’s a bit of a knack to lighting them, once going, they’ll stay toasty warm for up to 12 hours, although the heat strength can wear off a little over time.

By being proactive and cooperative during the security screening process, you can ensure a smooth and hassle-free airport experience. The bottle itself is made from rubber or thermoplastic with insulating properties that prevent the heat from escaping too quickly. These hand warmers use batteries or rechargeable power sources to generate heat, providing warmth for extended periods. Be prepared to present them for inspection and follow any additional instructions provided by the security personnel. You could even wear it around your neck and shoulders to ease upper body tension when working from home.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.

The Ocoopa doubles up as a phone charger too, with dual output that can even charge two phones at once if needed. Available in two sizes and seven different patterns, the cover is beautifully soft and plush, making it perfect for cuddling up to on a cold night. Those heat pad things made from activated charcoal that is meant for joint pain are brilliant to keep in your bag and near-instant heat.Before packing hand warmers, familiarize yourself with the specific regulations of the airline you’re travelling with. Another attractive full-length design, this long teddy hot water bottle is super soft, so it's perfect for cuddling when you crawl into bed at the end of a busy day. Alternatively, they can be tucked into pockets on a long walk or placed on your lap when sitting outside – and they’re an ideal size for travelling, too. READ NEXT: Fill up your hot water bottle with one of these top kettles Is it safe to use a hot water bottle?

When filling the bottle, pour carefully to avoid spillages – upright while in the sink is the most sensible method. Finally, we check to see which products have won industry awards and received recognition from trusted sources and feed this into our analysis too. As well as charging your mobile devices and compatible tablets on the go, this handy portable power bank also offers three heat intensity levels, with operating temperatures of up to 50°C. This reliable, budget choice from Cassandra has a ribbed surface design and comes with a five-year guarantee. It’s advisable to check the specific airline policies as some carriers may have additional restrictions.Most reusable hand warmers are allowed on planes, but they must be non-toxic, leak-proof, and in compliance with the TSA guidelines. 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. Before filling traditional bottles, check the rubber for any obvious signs of damage and discard immediately if you find any tears or cracks. We like the soft-to-touch curved silicone outer layer, which is available in several colours and protects it from drops, making it ideal for outdoor exercise in winter. All the products featured are suitable for adults, but if you're looking to kit out the whole family, we have a round-up of parent-approved kids' hot water bottles too.

Make sure to check the dimensions of your microwave though, as its size means it's not suitable for all devices.

We also carefully analysed expert opinions and combed through authentic consumer reviews to make sure every option we suggest is effective, safe and offers good value for money. YuYu's award-winning water bottle is designed to be wrapped around the body to soothe aches and pains.