Kids can sip like a superhero with Marvel Insulated Sippy Cups! Insulated cups keep drinks cool for longer and are great for families on the go. The silicone valve helps prevent leaks so that drinks stay inside the cup and off of your little traveler. These cups were developed with a Pediatric Feeding Specialist and feature a bite-resistant hard spout that is better for your child’s developing teeth. The shorter spout size also makes the transition to an open cup smoother for your child. Kids will drop things, but each sippy cup lid has a DropGuard bumper that helps prevent breakage. And when the cup is empty, the dishwasher safe design makes keeping it clean simple.