The safest infant feeding bottle on the planet! Award winning 11oz Kiki infant bottle is 100% plastic-free, environmentally progressive, and adapts to the needs of your growing child. Both the bottle and nipple collar are crafted from safe, high grade #304 stainless steel and our Natural Vent Nipple™ (medium flow) is made from medical grade silicone… so you can be sure that you are truly using a 100% BPA/BPS-free and toxin-free feeding system.