Made from Premium Crystal Polypropylene (PP), its durable and lightweight material, with a purer clarity compared to the usual PP material Air-colic system reduces intake of gas, a potential cause of colic Measurement indication by millimeter (ml) and ounce (oz) BPA / BPS free Heat resistant to a temperature of 110OC Available in 2 sizes 120ml and 240ml 120ml comes with S-sized Flexible teat. Suitable for newborn baby 240ml comes with M-sized Flexible teat. Suitable for 4+ months baby