Bottle empty?

Not at all! The reviewed here Stopper you will not happen. Unlike the hinged clasp closure Sigg drinking ABT Complete the closure-reviewed here is completely safe to handle. The conventional fastening manner via screw has the advantage not to open. So you need also no violent tightening of the closure. Even a slight increase in combination with the seal prevents unwanted absorption of water bottle. And I do not even see it as a disadvantage. On my walks or bike rides I stay mostly stand if I want a drink. It bothers me so do not turn up the thread to "need" me .It is a thousand times better than a dirty bottle to have a damp rucksack or posh end insects cattle on the mouthpiece.