Marcelle Multicolor stoneware mugs are made of echo friendly material.The 11 oz capacity is just the right size for a small cup of coffee.And the multicolor mugs are convenient for individualization.The mugs have a large easy to hold handles for everyday use. The two tone design of this mug and the coloring has made the MUG one our most popular designs. It feels the coffee just tastes better in these mugs.