This cute 2 piece egg poacher works in your microwave. Spray bowl with oil/ butter (optional). Crack egg into bowl and pierce yolk with a knife to release steam during cooking. Lid comes with vent hole. Just 30 seconds, and voila! Glazed in shades of blue with a deep green glaze underneath and finished with a shiny glaze. This round was made with our white clay. As always, use care when handling hot objects. Glaze design may vary slightly from the one in the picture.