This bottle is fantastic, love it! BUT, the two blue swivel loops holding the top are very easy to break. The problem is, if you don't squeeze the two sides of the balloon together absolutely firmly and then twist the hinge, the plastic of the hinge will be cut from the receiving side of the hinge. I've read about this in reviews before so I've always been very careful, but I just broke the second blue loop on my OGIO bladder :( I'll probably find a locking mechanism of its own if it falls…