The Innobaby Din Din Smart Stainless Steel 9 oz. Cup is designed with little hands in mind. Featuring a double-lined wall and a plastic shell to help protect your child’s hands from hot/cold temperatures. With an ergonomic handle designed specifically for little hands, perfect when transitioning from a sippy cup to a big kid cup. It is stain-resistant, odor-resistant, eco-friendly, and super easy to clean.