The Coffee Joulies are going in production in an old factory in the US. Must be exciting to do something like that.
I am still using that Thermos travel mug that I bought yesteryear, but you know what: I'm actually not all that impressed with it. When it's full of hot tea, the outside is too hot to hold, which shows that it's losing heat at a tremendous rate. I don't recall what technology they use for insulation, but it can't be all that impressive. They should use styrofoam instead, that sh*t works like gangbusters for insulation.