These insulated sippy cups with double-wall insulation keeps drinks cooler longer with a sweat-proof surface that s easier for your own little super hero to grip. The easy-to-clean one-piece lid on these Cars colorful cups are interchangeable with most reusable cups from The First Years. These spill proof cups for kids are dishwasher safe and made without BPA. Spill Proof Sippy Cup features spill-proof valve built into lid. Double wall insulation keeps drink cooler longer. Sweat proof surface makes it easy to grip.