When the power goes out in winter, warmth is the first thing you lose and the hardest to improvise. A quality vacuum flask lets you bank heat while you still have it: boil the kettle before an expected outage, or heat water on a camping stove, and a good flask keeps it hot for up to 24 hours. A hot drink, a warm meal or a filled hot water bottle does an enormous amount to keep a cold household comfortable and calm.
Unlike anything electrical, a flask needs no power, no fuel and no maintenance — it simply holds the heat you put into it. That makes it one of the cheapest and most reliable pieces of cold-weather preparedness, as useful in a stranded car or on a hill walk as it is during a power cut at home.
Fill it at the first sign of an outage or before heading out in cold weather. At home it means hot drinks and instant meals without repeatedly firing up a stove; in the car it is a lifeline if you are stranded in winter traffic; on the hill it keeps a hot drink ready when you stop. Pre-warm it with a splash of boiling water first for the longest heat retention.
It works the other way too: filled with ice and cold water it keeps drinks cold through a summer heatwave. Rinse and dry it fully between uses, and store it with the lid off so it stays fresh.
A vacuum between two stainless walls is what stops heat escaping. Stainless is tough and won't shatter like glass-lined flasks of old, so it survives being knocked about in a bag or car boot.
Look for a stated performance such as hot for up to 24 hours and cold for 24 hours. A larger flask holds heat longer than a small one, so size it to how many people you are keeping supplied.
A stopper that seals reliably prevents spills in a bag, and a lid that doubles as a cup means you can share a hot drink without extra kit. Check the closure is robust and easy to use with cold hands.
Around 0.5L suits one person out and about; 1.2L or more is better for a family at home during an outage, holding enough for several hot drinks or a couple of instant meals.
Filling a cold flask wastes heat straightaway. Rinse it with boiling water first, tip that away, then fill — you'll noticeably extend how long it stays hot.
A pocket-sized flask empties after a mug or two. For power-cut use at home, a 1.2L flask keeps a household in hot drinks for far longer.
Left shut with moisture inside, a flask can grow musty. Dry it fully and store it with the lid off so it's ready and fresh when you need it.
A rugged stainless steel vacuum flask that keeps drinks hot for up to 24 hours and cold for 24 hours. The 1.2L size suits a household through a power cut, with a leak-proof stopper and an insulated cup lid for sharing a hot brew.
A well-priced synthetic sleeping bag that keeps its warmth even when damp. A sensible, affordable way to make sure everyone has a warm bag.
Air-activated hand warmers that give hours of gentle heat with no batteries or flame. Cheap, packable warmth to stave off cold hands in an outage or outdoors.
A self-inflating mat from a trusted UK bedding brand — insulates against cold ground and packs down into its own storage bag, no separate pump needed.
A tough, British-made all-season sleeping bag built to keep you warm through serious cold. The dependable choice when staying warm really matters.
A warm, packable mummy sleeping bag suited to three-season UK use and cold-night emergencies. A comfortable way to stay warm if the heating fails or you're stranded.
A large, durable lambswool blanket that insulates even when damp and resists flame — dependable, reusable warmth for cold homes, winter car kits and nights outdoors.
Compact camping stove for boiling water and cooking food. Essential for hot meals and water purification.
Insulated sleeping bag rated for cold temperatures. Essential for any overnight emergency or planned outdoor stay.
Single-use or reusable heat packs that provide warmth for 6–12 hours. Critical for preventing cold injuries.
