Made of food-grade silicone material. Free of plastic, metal, BPA, PVC, and lead. Design a tiny air vent that allows air circulation, making sure it's easy for the baby to inhale. Silicone seal caps ensure that the water will not be able to leak from the space between the straw and lid. The detachable straw and lid make cleaning a breeze. 8" L x 6.7" W x 6.9" H