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. Our patented 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. Additional Information: ~ Only 100% plastic-free sippy bottle on the market ~ This bottle easily converts into a infant bottle, straw bottle or sport/water bottle by simply swapping the sippy spout 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 ~ Internal volume markings make measuring your child's milk or other beverage a snap! ~ Dishwasher safe and shatterproof