It is made of hard plastic and in every drop neither the cap nor the bottle has broken. The two times it fell, only the cap came off. Its negatives are that if you don't wash it right after use, it becomes difficult to suck (e.g., if a day or two passes) and the plastic where the strap with the Velcro is ripped when I tried to take it off to wash it. But the most important thing that other moms mention in reviews is that when you go to open it, the straw gets caught in the cap and the parent needs to pull it for the child to drink. It doesn't happen every time, but still. We have the fox and I can say that I can't find another company that has so many characters for bags, water bottles, containers, etc. Please improve your products a bit because they are both affordable and beautiful