The only thing old fashioned about this glass is its timeless battle-tested design. Other than that, our 10oz is modern, conveniently stackable and made with Tritan™ Copolyester, a shatterproof, ultra-durable, and dishwasher-safe material. They're even made to withstand the demands of a fast-paced bar environment.. This product is dishwasher safe.. Crafted with Tritan™ Copolyester, an ultra-durable BPA-free material, this collection is unbreakable and dishwasher safe. Made for the modern, real-life everyday.  Serve over a lifetime.. The RESERVE Collection. Where timeless elegance meets unbreakable durability. Designed to elevate your entertaining experience, RESERVE is crafted for beauty, functionality, and peace of mind.. Shatterproof, BPA-free, and made from ultra-durable Tritan™, these glasses are perfect for any occasion, indoors or out. Whether you're sipping poolside or hosting a sophisticated soirée, the RESERVE Collection has you covered with a blend of style and practicality.. Product Features. 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. 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 10oz/ 396ml. Cup dimension: 3.7" x 3.3"