Pair of bakeware custard cups. There are vintage Fireking Fire King cups.  They are a light blue in color. The pattern or design is called Philbe Sapphire Blue.  They are a thick oven safe glass. The cups measure 2 1/2" tall and are 3 1/2" in diameter.  Excellent condition, no chips or scratches that I could find. Both bottoms are stamped Fire King and one also has the number 15.