[whiskyboozer]

That well keep boiled water for tea warm for a good few hours.

[oakie]

Gadget Show top 5 flasks:

FiveFWD - Top 5 flasks video from The Gadget Show

[trev m]

I have a stanley
Water in at 5.30 am still ok at 1.oo pm

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Trev

[Jay J]

I buy Aladdin flasks. You can get them in specailist camping shops eg Millets or just about anywhere, Argos, even Boyes sells them.

I do find with Stainless Steal ones it's best to first fill them up with boiling water first to Pre-warm them. Then tip out and make hot drink.