These make me happy. How delightful are these mugs? Utterly! Called Head or Tail, they're designed by talented young Danish designer Anna Olivia and are sold in sets of two: a head and a tail. Choose from Pigs, Horses, Cows & Sheep. I can't imagine stacking them without seizing the opportunity to create fun Griffin-like barnyard creatures. Hope to cross paths with a retailer for these soon!