Vintage MCM Roly Poly Spaghetti String Shat-R-Pruf Glasses, Set of 13 Multicolor Drinking Glasses 10oz. Fun set of spaghetti string Roly Poly glasses from the 1950s made by Color Craft as part of their Shat-R-Pruf collection. Each glass is coated with a form of plastic called plastisol which feels like rubber. This coating helps to make them less likely to shatter. This design was created to keep liquids cooler and to have less condensation. They were considered easy to hold and did not fade in the sunshine or wash. Due to their age, hand washing will be a must to preserve them. These are priced to sell.