This is a beautiful luster ware, shell shaped rainbow creamer by Royal Bayreuth, Bavaria. It has many beautiful colors including light blue, green, purple, and yellow. It is marked Royal Bayreuth on the bottom of the cramer.
It is in excellent condition (no chips, cracks, or scratches). It measures 4.25 inches high by 4.5 inches at its widest point. This is the prettiest creamer I have ever come across.