Infinium Stacking Mixing Glasses are built for peak functionality in the toughest foodservice environments. The large capacities reduce refill trips, while effortlessly stacking to minimize the storage footprint. And like all Infinium products, it is made of 100 percent BPA free Tritan copolyester, which is highly resistant to damage, while providing glass like clarity. Keep your drinks looking and tasting great with Infinium . Fully stackable, will not stick. Water drainage notches in the bottom. Multi use, indoors and out. Glass like clarity. Commercial dishwasher safe. Outperformed SAN and Polycarbonate is dishwasher and drop testing. Resistant to cracking and crazing. Resistant to staining and odor retention. Can contain hot liquids up to boiling.