I'm so happy with this drinking bottle. It's very sturdy and keeps my ice frozen for up to 3 days. I couldn't believe that I still had solid ice for that many days. I filled it up to the top with ice and just kept adding water as I needed, and the ice stayed frozen. The design of the lid is excellent, with the clamp down lid and a automatic push button to open it, my water stays clean. I don't care for the straw in the middle of the lid, it seems to make it more difficult to drink from. The stra...