OK... keeps things warm or at least from freezing for sure.
Velco has a "double-back" tab that makes these much more secure than older models.
Alright... this is a serious blunder! Instead of using a slippery nylon liner, they used some grabby fleece-like liner that makes it tough to get in or out. Additionally, the parka itself is very snug on a 1-liter Nalgene. I do not like having to ask hiking partners for help to get a water bottle out... nor do I like having to drop pack to get a water bottle out. Come on OR... you are better than this.
Extra bulk is worth the hot drink while belaying. Light and well designed. I put boiling tea in when we leave an it is still toasty at lunch. It isn't a thermos though, so don't expect it to be. Fairly light