Earl S. Tupper began experimenting with plastics in 1938 and by 1945 had produced his first tumbler. Tupperware Home Parties was formed in 1951 to sell products through dealers using a party plan. This set of Tupperware Wagon Wheel coasters are in unused condition and still sealed in their original packaging. The coasters are 3" across. The caddy measures 3 3/4" long, about 3 1/8" wide and 1 1/2" tall. The set is pictured in "Spiffy Kitchen Collectibles" by Brian Alexander. The patent for the coaster set was issued in 1966. A perfect set for your retro home!