Keep It cool: insulated cup walls keep drinks cool for longer, making it great for families on the go Smooth transition: the shorter spout helps your child get used to the sipping action they will use with an open cup Proper oral development: bite-resistant hard spout is also better for your child's developing teeth Leak PROOF: silicone valve prevents leaks and helps to keep the drink inside the cup and off of your little one Drop Guard: The sippy cup lid has a Drop Guard bumper to help prevent breakage