Breakaway Glass, Sugar Glass, Stunt Glass and Toffee Glass are all the same product. They are now manufactured using special plastic resin formulations. Sugar was last used in the 1940's All Breakaway is waterproof and non-toxic. However, care should be taken to match the temperature of liquids placed in the breakaway glass to the temperature of the breakaway glass. Otherwise, thermal shock may cause cracking. A "Do & Don't" InstructIon Sheet is provided with all orders. TWO BREAKAWAY GLASS QUALITY LEVELS ARE AVAILABLE: Film---best quality, very tiny bubbles, no runs, tightly controlled color. Stage---may include some minor bubbles, runs and color variance. ALL PHOTOS IN THIS CATALOG ARE OF ACTUAL BREAKAWAY GLASS PRODUCTS.