From the product description, check product page for current description, price and availability:

• ⭐UNRIVALED QUALITY – You may find cheaper cups on Amazon, but there’s no beating the quality of our cups, made only from Premium 304 18/8 Food Grade Stainless Steel.
• ✔SUPERIOR FINISHING INSIDE & OUT – Polished on the outside for a superior finish and brushed look. Electropolished on the inside to ensure your cups remain rust-free! Imparting NO metal after-taste or unwanted flavors, giving you a clean tasting drink every time!
• ✔TOXIN FREE, HEALTHY, SAFE & ENVIRO-FRIENDLY – BPA Free, Phthalate-free, Lead and Toxin-Free – Pure 100% Stainless Steel! Environmentally friendly and completely recyclable (including packaging)!
• ✔GREAT FOR EVERYTHING FROM KIDS TO OUTDOORS. EASY TO USE, CLEAN & STORE! – Extremely Strong and Durable. There is no breaking these babies. Stackable and look great in any home. Dishwasher safe. Can be used for almost anything from juices to ice cream. Add a sleeve or cozy (not provided) and use for hot drinks too!