This is the second type of collapsible water bottle I've bought. I returned the first one. This one is great because although the material is made of food-grade silicone, it is not as flimsy as I would expect. On top of that, it has a sliding removable plastic piece for you to hold. Perfect bottle for the traveling biking minimalist!
Wonderful product. The gel "knubs" are the perfect hardness, not too hard not too soft, and combined with the vibration it really helps dig deeper into your muscles than a standard foam roller. I am one of those people who really has to loosen up before working out to not get injured and this roller has helped me stay injury free.
Love the product, very useful for certain areas such as: foot, gluteus maximus, and others body areas that need deep penetration to release tension on those tight spots. I used the ball especially on glutes before running and I feel I can run more down the stretch.
— Jonny