I love my Stanley Quencher H2O Flowstate!!! The only issue I'm having is that the lid like vacuum seals, making the tumbler EXTREMELY difficult to open. I have Multiple Sclerosis, I purchased 3 tumblers for me and my little family. They are not disabled and both agree that mine is extraordinarily difficult to open. But, I'm rarely alone, so someone will get it for me, lol. Truly an investment, as they are a bit on the pricey side. But they are worth the money. I do wish that the straw was metal. The plastickie vinyl ish straw stains with my lipstick and is not good for the environment. I will be purchasing other Stanleys soon.