Recently purchased a few more of these as they keep disappearing on me. I think that is due to fact everyone has one that looks like this. That is one of the down sides to these. It is hard to keep track of yours. They are easy to grasp and squeeze water directly into your mouth past face protector and/or mouthpieces. Huge plus is that they are top rack dishwasher safe. At 32oz it is just enough to last me a game and fits easy into any cup holder. The one-way valve is great spill proof and backwash proof. I just wish these weren’t so expensive. They are about $33 for 6.