Made of the ultra durable, super resilient, and nearly indestructible Tritan material. Nests and stacks for efficient storage. Crystal clear and feels just like glass with a superb hand weight. BPA-free and FDA-approved for kids. Made to last and withstand decades of use (it's the reason we chose this material as the longer a product lasts, the better it is for the environment). Made in the U.S.. Holds 14oz/ 414ml. Repeated or prolonged exposure to essential oils such as those found in citrus or sunscreen can cause the surface of the glass to turn hazy. Hand wash with warm water and soap as soon as possible to prevent haziness. Top rack dishwasher safe. Heat resistant up to 230F. Microwave safe. Freezer safe. Avoid using abrasive cleaning devices to avoid marks and scratches.