Amazing! Wonderful product!
I got one of these bottles for testing at the start of the year so I did all kinds of crazy stuff with it. The big one? Leaving a black bottle in the sand on a 35 degree day while I went surfing. When I got back the water was still icy cold from the fill up at home and the lip of the bottle wasn't burning hot as it's protected by the large cap. Nice.
The warmth retention is good too, fill it up boiling and it'll be a comfort temp all day. The lid will retain some flavour if you fill it up with coffee, but after a few uses it washed away. I'd get 2 if that bothers you (it doesn't bother me, my camp brekkie always has the taste of last night's dinner).
Finally, it's super strong. Most of these bottles get dents, lose the finish or embossed logo or get scratched up. My MUVE still looks brand new 9 months later and is my go to bottle for crag and beach days.
My daughters and I have had the large bottle for almost a year now and it is fantastic. We put ice cubes in which keep the water cold and lasts until the next day even when left in the sun on seat of car. Looking at getting the smaller ones for travelling