insulated silicone Natural Vent Nipple sleeve, and travel cover. 3m + * VACUUM INSULATED: Keeps liquids cold for up to 12 hours (iced) * SAFE: Only 100% plastic-free stainless steel baby bottles on the market; only Made Safe® Certified bottles on the planet. Insulated with a certified lead-free seal.  * Baby Grows… Bottle Evolves™: This bottle easily converts into a sippy bottle, straw bottle or sport/water bottle by simply swapping the nipple out for another Pura silicone lid * Zero Plastic… Zero Yuck™: Bottle and collar crafted from safe, anti-bacterial, #304 stainless steel and Pura Anti-Colic Natural Vent Nipple™ crafted from 100% medical grade silicone * BPA-free, BPS-free, PP-free, Polypropylene-free, phthalate-free and will not leach toxins like plastic bottles and lids because our products do not contain any plastic! * Internal volume markings make measuring your child's milk or other beverage a snap. Each ounce is marked and can be seen by glancing inside the bottle. * Compatible with wide neck nipples from Pura, ThinkBaby™, BornFree™ and many others * 100% medical grade silicone bottle sleeve + nipple cover * Hand wash recommended * Lifetime warranty on stainless components