I must confess to forgetting about my tea for hours as I was busy learning all about the secrets of wheel changes. When I did come back to it to take a sip, I did think that it would be lukewarm at best. To my surprise I actually burnt my tongue, things were still that hot. (It also keeps things cold of course).
That was it. I wanted one as I could see the benefits of having it at work and also when out and about on my many Brompton related adventures.
I managed to get these two for £9.88 each from Wiggle - which was the cheapest price I could find. They do come in 11 different colours and apart from the matt black I was drawn to the orange version for some reason...
The lid had a another screw off compartment where presumedly you could store sugar etc. There is also a little pressure escape valve. Added to this is the fact it is made of stainless steel, totally waterproof and holds 300ml (a decent sized cup of tea or coffee) it really does have it all.
So, next time I am out on my travels one of these is coming with me!