Boil it, drop it, sip it - this sippy cup can take it. The GoSili sippy cup is made from the highest grade nontoxic silicone on the market and is embedded with a stainless steel ring to keep it from collapsing from tiny hands. With no valves and an airtight seal, it's easy to clean, spillproof, and perfect for toddlers. European-grade silicone with embedded stainless steel ring. BPA, BPS, phthalate, PVC, and lead free. 8 oz cup. Safe to boil and sterilize. Dishwasher and microwave safe.