"• VACUUM INSULATED: Keeps liquids warm for 6 hours or cold for up to 24 hours (iced) • 100% Plastic-free & only Non Toxic Certified bottles. • One Life, One Bottle concept. Bottle can be converted into a straw, Sippy or small water bottle by swapping with another Pura Silicon lid. • #304 stainless steel & Medical Graded Silicone accessories. • Internal marking makes you measure child's milk or other beverages. Each ounce (appx. 30g) is marked & visible at a glance inside the bottle. It is first (and only) 100% plastic-free vacuum insulated infant bottle on the market and only NonToxic Certified bottle on the planet. This award winning 9oz Insulated Kiki infant bottle is 100% plastic-free, environmentally progressive, and adapts to the needs of your growing child. Both the bottle and collar are crafted from safe, high grade #304 stainless steel and its Natural Vent NippleTM is made from medical grade silicone. (Medium flow rate nipple is included). With Pura, you can be sure you are getting the safest bottle on the market (BPA/BPS-free and NonToxic Certified). Of course, like all products in the Kiki line, the insulated infant bottle features its unique Baby Grows...Bottle EvolvesTM technology that allows this bottle to grow with and adapt to the changing needs of your child. Change the bottle with a simple swap of the silicone mouthpiece (nipple, spout, straw, flat cap, Big Mouth Sport top, plus others in development!). With Pura you can rest assured that you are always using the safest and most eco-progressive bottle on the market. "