The safest infant feeding bottle on the planet! Our 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. Additional information: ~ ONLY 100% plastic-free bottle on the market; only MadeSafe Certified bottle on the planet ~ This bottle easily converts into an infant bottle, sippy bottle or sport/water bottle by simply swapping the nipple out for another Pura silicone lid ~ Anti-colic Natural Vent Nipple (medium flow) crafted from 100% medical grade silicone ~ Internal volume markings make measuring your child's milk or other beverage a snap. ~ BPA/BPS-free and will not leach toxins like plastic sport tops, bottles, or lids ~ Dishwasher safe