Coffee Tumbler, No-slip Grip Side and Bottom, Extended Hot/Cold Temperature Retention, Ceramic Lid The Elemental Artisan 12oz Tumbler with unique ceramic lid provides an at-home drinking experience no matter where you are. The tumbler keeps your beverages warm even on-the-go. No-slip bottom. Curved interior for easier cleaning. Elemental tumblers are BPA free and food safe. They are built with triple wall copper insulation, can keep your hot drinks hot for up to 6 hours and cold for up to 18 hours!