This 4-pack of Stanley shot glasses is designed for adventurers who cherish durability and portability. Crafted from rust-proof, food-grade 18/8 stainless steel, these 2 oz (59 mL) glasses are built to last and are BPA-free, ensuring safe consumption. The glasses feature a smart nesting system within a stainless steel carrying case, making them leakproof and compact for easy transport on any urban or outdoor adventure. They are also dishwasher safe for effortless cleaning. Stanley has been producing rugged, high-performance products with a lifetime warranty since 1913.