Nayad™ Neo 16 oz Coffee Grounds/Recycled Polypropylene Tumbler has an outer layer made of a new material consisting of recycled coffee grounds and recycled polypropylene. Made of 18/8 stainless steel with a copper finish and double-wall insulated to keep beverage hot or cold for up to 3 hours. Push-on lid is 100% BPA-free ABS plastic with sliding drink opening. Condensation-free surface and designed to use with most standard single serve coffee makers.. Hand wash only. FDA certified.