Keeps coffee hot all day - Cauldryn Fyre Mobile Water Bottle

I've been using this bottle for a couple of days, and so far I've been pretty happy with it. I get called away from my desk a lot, so it's nice to be able to fill it with coffee in the morning and keep it hot all day. There is an extra hot mode that keeps it around 160 degrees. There must be some kind of thermostat in it. When the drink cools a little bit, it kicks on the heating element to bring the temperature back up.

I haven't tried to boil water with it yet, but I see how that could be useful to sterilize water or make one of those freeze-dried meals. It was a little confusing to operate, but I was able to figure it out after looking at the pictures in the instructions.