Cardew Design"Luck of The Irish The Emerald Isle" Mug (Set of 4), 15 oz, Multicolor Set of 4 mugs Porcelain china Designed by Paul Cardew, world famous UK artist, specializing in teapots and accessories for over 35 years High Fired Porcelain with full wrap around decal, extremely durable Highest quality ceramicware, dishwasher and microsafe