I bought this product to replace an old Sigg water bottle I have been using for the past 5 years. Seeing as how much I liked my other one, I figured "Why switch?" Loved this bottle the first day, and then the second, but on the third the inside lining started peeling off. And let me tell you there is nothing worse than taking a drink from your water bottle only to end up with some little rubber pieces floating around your mouth. Im back to using my old bottle... I would have only given it one star, but it is still a damn good lookin bottle and I cant bring myself to throw it away.