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! Black underglaze with blue, finished with a shiny glaze. Made with our white stoneware clay. As always, use care when handling hot objects. Design may vary slightly.