Pura Kiki 11oz/ 325ml Stainless Steel Sippy Cup Bottle Pink Swirl Sleeve 100% Plastic free bottle compatible with natural vent nipples, silicone sip spout, straw, and sport top from Pura. Crafted from safe, anti-bacterial, #304 stainless steel and medical grade silicone components which contain no plastic, BPA, EA, PVC or other toxins that could leach into beverage BPA-free and will not leach toxins like plastic bottles and rings Stainless Steel Bottle. 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.