Innobaby’s Sippin Smart ez flow straw sippy allows ez drinking in any position with its ez flow design. ez flex smart straw is designed to be leak resistant even when it is flipped and offers a continuous flow in any position with its weighted stainless ball. ez transition comfort straw is designed to be durable and comfortable with its bubble shaped curve to prevent slipping while sipping and making transitioning to a straw cup easier. ez grip lid with leak-proof silicone seal makes it 100% leak-proof. Silicone air release valve prevents liquid overflow and guarantees easy flow. Designed with a wide cup opening and curved base, Sippin Smart ez flow straw sippy is easy to clean. Set Includes 1 10 ounce cup with handles, 1 ez grip lid with flip top cap, 1 silicone ring for leak-proof seal, 1 silicone smart straw with weighted ball, 1 straw cleaning brush. BPA , Phthalates , PVC , Lead Free. Top rack dishwasher safe.