Agreed Angela, referenced on Page 224 of Margaret & Kenn Whitmyer's book Bedroom & Bathroom Glassware of the Depression Years. The book states these were produced in the late 1920's and early 1930's. The book shows each tray with a matching pitcher and tumbler and is called a "Guest Set"
Comes in Pink, Green, Amber, Vaseline, Amethyst, & Cobalt. Each colour could be plain, gold decorated or etched.
ID = Paden City USA - Guest Set