EXPECT LONGEVITY- Made to last long- embedded with premium quality 304 18/8 Food Grade Stainless Steel, which means long lasting durability with a steel that consumers can trust.;RUST PROTECTION - Stainless steel separates itself from regular steel by the amount of chromium present in the metal. If enough chromium is present in steel, it will build a protective layer that will prevent both surface and internal corrosion of the steel. In other words, rust has a hard time growing and spreading with true stainless steel.;SAFE & ECO FRIENDLY - 100% stainless steel- Safe for everyday indoor or outdoor use, Lead and Toxin Free, BPA Free, and Fully Recyclable;DISHWASHER SAFE & STACKABLE - Space savers and perfectly stackable for trips to avoid the mess of carrying disposable cups. Got dirty cups? Well no worries just stick them in the dishwasher and expect new looking cups everytime;FUNK- FREE- Will not change the taste of your beverage