It was a bad experience! I bought this bottle to my son and after 4 times using! The small rubber ring that prevent leaking was detached! I contacted Borosyl by Instagram and the answer was "sorry we cannot do anything and you need to buy a new one" I was just asking if was possible to buy spare parts to continue using the bottle. The product in general has good quality but lossing almost 70 aed because small ring is not fair