Microwave Butter Warmer With Pouring Spout Special stoneware butter warmer lets you easily melt butter in the microwave and then serve it from the same container. Featuring a convenient handle, lid and pouring spout, it s also great for melting chocolate or serving warm syrup. Dishwasher and microwave safe. Material: Stoneware. Measures 3 1/4"Dia x 4"H.