It does keep hot drinks hot for 12 hours, but it’s on summer adventures that this flask really comes into its own, keeping iced drinks cold for more than 24 hours. This vacuum-insulated flask from Black+Blum is a highly distinctive and eco-friendly option for keeping your food nice and warm. Ice cream won’t quite go the distance, but if you pack the flask with a handful of wrapped lollies straight from the fridge they’ll stay frozen for a few hours.

The wall of the inner flask is silvered to prevent heat radiation deflecting heat away from the flask. Strong colors and an easy usage: There are no hidden compromises with TC, but only reliable products for a sustainable lifestyle. Some of the winners on our list can insulate for more than 24 hours, which is long enough to survive the toughest hike or most gruelling commute. Glass-lined flasks are more dangerous because glass walls can also shatter To be safe, it's best to empty the contents after 24 hours.

Finally, that colourful, ergonomic spoon stays fixed to the flask by slotting into the artificial leather strap, so you will never end up drinking your soup like tea. grade steel: Today’s best flasks are made from stainless steel that doesn’t secrete chemicals (they’re BPA-free, in other words) or weird flavours.

Flasks are more 'smell prone' than 'stain prone' – none of the flasks we tested had any staining after cleaning, but some retained a faint coffee smell. You should also note that the picture images show only our serving suggestions of how to prepare your food - all table accessories and additional items and/or ingredients pictured with the product you are purchasing are not included.

It may not be reproduced in any way whatsoever without Wm Morrisons Supermarkets Limited prior consent, nor without due acknowledgement. Once sealed, it can keep food hot for up to six hours, while boiling water will stay piping for ten or more. And if you’re heading out there with a friend, even better, because there’s a second plastic ‘buddy cup’ hidden inside the larger metal one. The classics stone grey and sapphire blue show cool understatement in the choice of colors, while with teal and rose gold you skillfully set highlights and definitely draw attention to yourself.

Textured coatings are useful – it’s a nice touch to have a handle on a drinks flask but generally, for a one-litre flask, it’s more useful to have a textured coating that provides grip. The TC colors definitely make you want more and in combination with the straight-line look of the TC companions, they also pass directly as a universal accessory!

This fab lightweight flask is designed to survive anything, without messing with the temperature of its contents, keeping your brew comfortably hot for 12 hours. Hot porridge in the TC FOOD JAR, cool mate tea in the TC BOTTLE: with the TC Range, there's no reason to limit yourself or resort to unhealthy fast food. The flask is wide enough to be used as an insulated lunchbox, too, but you would need to bring your own spoon. However, it doesn’t insulate for as long as the Stanley Master, and it’s a bit drippy when pouring from the spout, at least when it’s full.

Some flasks are dishwasher safe but others should only be hand washed – every flask is different and it's best to check before you clean.Key specs – Material: 18/8 stainless steel with copper coating (dishwasher-safe); Capacity: 1l; Size: 23 x 12 x 11. A Thermos King will last years but it’s not officially dishwasher-safe, and you’re not even meant to submerge it in water (if you do, you kill the manufacturer’s 50-year guarantee).