Make a sustainable choice with Nayad™s coffee ground eco-friendly line Nayad™ Infinity 14 oz Coffee Grounds/Recycled Polypropylene Tumbler has an outer, removable sleeve, made of a new material of recycled coffee grounds and recycled polypropylene. The inner tumbler is made of 18/8 rust-free stainless steel construction, is double-walled insulated and copper-lined to keep beverage hot up to 10 hours and cold for 20 hours. The wide-mouth lid is 100% BPA-free ABS plastic with silicone sipping cap. Condensation-free surface, with compact size, is designed to use with most standard single serve coffee makers such as Keurig. Hand wash only. FDA certified.