I love this product, the 150ml is the perfect size to thow in my pocket for those hour+ runs. The bottle material is good and i love that it collapses.There are some downsides and ways this could be made better. After about three months one of them developed a slit in the mouth piece, probably because you have to bite to get water, and now it will slowly leak in my pocket. If this was made a little more durable, that would be great. But i probably won't get anymore because i don't see longevity,See full review