Since I have this bottle (s) I really drink enough. I have always been a while and then she is in the office on the desk and is refilled from the tap. Even when driving super - this by the Trinkhalmprinzip always the view of the street. Once up 2x a week you put in a dishwasher and then it is again nice and clean ... and so I will also always have, I have the same second it gained!