I always use a genuine 1.5ltr thermos with a glass liner. Stays hot all day and half the price.

 

Anyone ever used one? They are in Tesco for around 20 quid. Not massive so a bit pricey but they state they keep drinks hot for 30 hours.
That's a decent time.
Never heard of these before though so im after real reviews.

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Pelo I bought one in Bulgaria a 750ml so just under a litre it cost me £40 but the best flask Iv used for years. Defo worth the cash

 

Afraid I can't help, but have recently purchased 500/900ml thermos stainless flasks and they are brilliant.
Drinks are too hot to drink after 8hrs if you preheat first. And even leaving just a cupful in for a few hours it still very hot.

They are also very light and have a very easy to clean top.

They however are expensive, think I paid £29 each on amazon

https://www.amazon.co.uk/gp/aw/d/B0..._FMwebp_QL65&keywords=thermos+ultimate+flask&dpPl=1&dpID=31ecCfouh6L&ref=plSrch

 

Brilliant, cheers gents.

 

Actually just remembered I have one of the auto seal coffee mug/flask which is well designed. But that is only good for a few hours