We've had a 1 litre Thermos flask for 20 years. We have found that even though you use a bit of the liquid, the rest still seems to stay hot. Only prob is, it's only got one cup. I have a stainless steel one from Asda, I think and it's nowhere near as good. Imo you get what you pay for.
I've had an aladdin and a couple of vango ones in stainless steel - both work fine. I put boiling water in them to keep the drinks warmer for longer. Can't fault em...
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets