Anything that has to do with the actual purpose of use folds, very good indeed. Initially slight odor, which is but completely disappeared after a few days and a few uses. Very soft on the mouthpiece / valve. Opening / closing works perfectly, cleaning is also very easy. The material of the bottle is soft to speed by pressing the drinking, but at the same time quite stable. I am really very happy with the part. Two little things I would still call and deduct a point for it: 1. the cool exterior design has already after short use and few withdrawals from the bicycle racks on significant scratches. The color does not hold good. Does not matter, because in this design it does not fall immediately catches the eye, and almost any other water bottle see also eventually no longer beautiful. 2. (probably only relevant for operation with mountain bike:) carbonated mineral water or eg Cola / apple juice do it every now and then, on bumpy develop enough pressure to push up the drinking valve. This escapes some gas, and depending on the level and one or two droplets of liquid. That's not a problem, depending on the contents of the bottle and the bicycle frame but sometimes make a little sticky.
