I bought the bamboo thermal mug a month ago, more out of curiosity. At first I was skeptical – I've had thermoses before that promised to keep heat and didn't last more than an hour. With this one, my morning coffee was still hot after four hours in the car, and after six it was warm, not lukewarm. The lid seals well, doesn't drip at all, and the bamboo hasn't absorbed any odors, as I feared. I used it daily at the office and at home, I wash it by hand with lukewarm water and it looks the same as on the first day. The only thing I would mention: the ceramic insert feels fragile if you drop it, but so far I haven't had any issues. For me, it was a good choice and I'm thinking of getting the tea set as a gift.