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. Here is a set of six colorful Tumbler Mates Stirs. They were produced in the 1950's - 1960's. The set is in excellent condition. The stirs are marked "Tupperware Orlando, Florida Made in USA". They are pictured in "Spiffy Kitchen Collectibles" by Brian S. Alexander. Shipping will be discounted on multiple orders.