High quality stainless steel tumbler made with high quality polyester glitter. Sealed with several coats of FDA compliant epoxy for extreme shine and smoothness. Handle cup with care - epoxy is strong but will crack like glass if dropped or mishandled. Do not soak or use abrasive or put in dishwasher. Handwash only - with warm water and soap. Do not leave in extreme temperatures (like cars or outside during high heat or freezing weather).