T.G. Green manufactured Cube teapots in the 1920's and 1930's, according to Paul Atterbury's Cornish Ware book (2001).  The coordinating Cornish Cube toast rack is shown on page 44. It is in excellent condition, with the Cube backstamp on the base. There is no crazing and there are no chips. Size is 5 1/4" long, 2 1/4" tall, 2 5/8" wide. The last picture shows a faint blue smudge from the manufacturing process.