I knew this bottle from America, where she has really everyone in the school! From the design I was immediately enthusiastic and also the drinking device I find great! So now I have sometimes one ordered me to Amazon, which was not even much more expensive than in the US. My mother was immediately against it because she thought that you can not really get clean the bottle with a straw, but even that is not a problem, because you can really take apart such an extent that in the dishwasher everything is clean. However, the straw discolored after a time, when you not only drinks water from it. When my Camelbak finally arrived, I was disappointed because I did not hinbekam to drink from because the lock was closed at the top, on the Internet, I've been looking for the solution, although people have the same problem but no solution is found. I've been giving up on it and prepared the return shipping before when I came into the Amazon reviews on the same problem, with solutions. One should just as long as possible and to chew it until the shutter opens. Try it with a sharp object in no way !!! For me it has then worked for a while, now I can use my bottle properly!