BPA FREE ,PVC FREE ,PHTHALATE FREE, POLYCARBONATE FREE glassfeeding bottles. does not contain anything harmful and is non-reactive when it comes in contact with acidic matter or harsh chemicals . This glass feeding bottles is BREAK RESISTANT and has a 100% food grade safe silicone sleeve with a coefficient EXPANSION rate of 30%. it can withstand up to 260'c! Designed with your child in mind ,it has been modified for MAXIMUM DURABILITY,giving extra protection where needed while keeping its sleek and contoured design.