Awesome vacuum bottle! Keeps hot water/coco too hot to drink after 8hrs, even when stored in the freezer. After 36hrs, hot coco does just turn to warm coco....but that's still awesome when coming back from an extended climb.
Few complaints: The bottle definitely isn't light, so take that into account when looking at bottles to take into the backcountry or leave in the car. I would have preferred the inside of the cub/lid be stainless steel as well, but it's plastic lined. As others have mentioned, the inner lid is finicky, but easy to figure out with a few uses.
Definitely a great product. Love having it!