"The 11oz sippy cup is the ideal transition for your toddler when he or she is ready 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. XL Sipper vented soft spout is crafted from 100% medical-grade silicone so you can be sure that you are truly using a toxin-free feeding system.SAFE: only 100% plastic-free sippy bottle on the market Baby Grows... Bottle EvolvesTM: This bottle easily converts into a infant bottle, straw bottle or sport/water bottle by simply swapping the nipple out for another Pura silicone 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 SpoutTM 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. Compatible with wide neck nipples from Pura, ThinkBabyTM, BornFreeTM, and Dr. Brown'sTM and many others Medical grade silicone nipple cover Dishwasher safe and shatterproof Lifetime warranty on stainless components 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."