A useful set that works in many situations. Various types of caps (one – the smallest – fits standard, traditional water bottles), the largest one fits, for example, a 1L Nalgene bottle with a wide thread. Interestingly – it does not fit a very similar Helikon bottle. Overall quality is OK. Very pleasant mouthpiece. A small minus for a missing piece in the gray, movable part, like a button for disconnecting the tube. The set was new, factory sealed. One of the buttons works lightly, smoothly, while the other, due to a small missing piece at the hinge, is much harder to press and disconnect. Fortunately, I don't plan to disconnect it often. It's a pity that the set doesn't come in other colors.
