Purple Slag Mug which is called the Bird in Nest with Flowers. Bird in Nest with Flowers. There are two nests on the mug with a bird flying to the occupied nest and another bird flying towards it. On the other side there is a single bird flying above the a nest which has three eggs in it. On the bottom there is an embossed image of a cat. I have tried to show the Cat, but it is difficult to photograph. The color on this Mug is wonderful. This Mug is referenced in Belknap's Milk Glass book. It was made by US Glass at the turn of the century. It is 3 1/4" tall and is in great condition for being over 100 years old. There are no chips or cracks. Just some rim roughness which is normal for these Purple Slag items which were made so many years ago.