As an avid water drinker, I have gone through my fair share of water bottles to find one that I like. Plastics always start to taste funny, metal ones taste funny from the beginning, it's hard to find the best opening, etc. This water bottle is perfect in every way. The opening is a good size to drink from on the go and the glass is great. The silicon REALLY protects the glass. I have dropped this bottle and it bounced right back up. The silicon is difficult to get on and off but I want it to be because I don't want it slipping around. I carry this around with me everywhere so, like I said before, it's perfect on the go. I agree with one of the other reviews that the bottle is difficult to clean, but I just stink mine (after removing the silicon) in the dishwasher in a tight spot so it stays opening downward, and I think it gets perfectly clean.I would recommend this water bottle to anyone.