Sloth is never a sin before coffee. Microwave-safe and dishwasher-safe. We carved all the way through the bright, shiny glaze of this extra large SLOTH mug so that the bold natural stoneware ceramic can be seen. Engraving will never wear or stain. Other colors may be available. Food-safe! Glaze you can feel good about: meets CA’s Prop 65 limits for leaching of lead & cadmium (0.99 ppm lead and 7.92 ppm cadmium). In fact, our glazes are non-detect at testing detection limits well below (< 0.01 ppm for both).