"Spillproof" bottle leaks every time. If you're looking for a bottle that you'll feel safe leaving in you pack, setting on the seat of your car or leaving any other place where it will not be stored 100% upright at all times, look elsewhere.This "spillproof" bottle is anything but. Have gone through 3 of these (under impression first 2 were defective). The bottles are not defective, just defectively designed and marketed. All 3 have leaked all over my pack, car, etc...No point in paying extra for the "spillproof" lid if it doesn't work as advertised.