The 11oz Kiki Sippy Cup is the ideal transition for your toddler when he or she is ready move away from a nipple bottle. With a 100% plastic-free bottle and 100% medical-grade silicone XL Sipper, you can be sure you are truly using a toxin-free feeding system. Featuring the Kiki stainless steel lid design that allows the bottle to be used with Pura’s silicone straw, flat cap, or Big Mouth sport top, you can easily swap out for the lid your child prefers.