The 11oz sippy cup is the ideal transition for your toddler when he or she is ready to move away from a nipple bottle. Like all products in the Kiki line, the toddler/sippy bottle is 100% plastic-free so you can be sure you are getting the safest, BPA-free and toxin-free bottle on the market. As with all products in the Kiki line, the sippy bottle features its patent pending stainless steel lid design that allows the bottle to be used with Pura’s silicone straw, flat cap, or Big Mouth sport top. And, if your big boy or girl is likely to have a little brother or sister, the sippy can be seamlessly converted into an infant bottle by swapping the spout for one of the silicone Natural Vent Nipple! Kiki is shatterproof, 100% toxin free. Includes a silicone travel cover. SAFE: only 100% plastic-free sippy bottle on the market. Baby Grows... Bottle Evolves: This bottle easily converts into a infant bottle, straw bottle or sport/water bottle by simply swapping the nipple out for another Pura Silicon Lid. Crafted from safe, anti-bacterial, #304 stainless steel and medical grade silicone. 100% BPA-free and will not leach toxins like plastic bottles and rings. Pura XL-Sipper Spout crafted from medical grade silicone. 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. Medical grade silicone nipple cover Dishwasher safe and shatterproof. General Instructions: Wash before first use. Boil for 5 minutes to sterilize. Remove the sleeve from the bottle at least one time per week to clean between the bottle and sleeve, more often in humid climates. Dishwasher safe. How to install sleeve: Add baking soda to the inside of a dry sleeve then slide onto the bottle. Rinse thoroughly. OR At the sink, spread a pea-sized drop of liquid dish soap inside the sleeve then slide the sleeve onto the bottle. Rinse thoroughly.