Enjoy the taste of metal or plastic in your water? Didn't think so; that's we have these glass hydration bottles fitted out with protective, insulating silicone sleeves. The 16-oz. glass bottles keep water pure and fresh, the silicone sleeves cushion the glass against impacts, help keep water cool, and give you a secure, comfortable grip. Both the glass bottle and the silicone sleeve are dishwasher safe. The threaded, airtight cap is leak-proof.