Plastic Cups Tumbler Cups 12 oz Tumblers Drinking Glasses Set of 4 Tumblers Caspari plastic cups. Crystal-look 12 oz. tumblers. Set of 4 plastic cups. Use these tumblers for rocks glass, water glass,whiskey glasses, double old-fashioned, Scotch glasses, etc. Dishwasher safe. BPA Free Reusable, shatter resistant, clear plastic crystal-look. Available in many colors. Colored plastic cups or tumblers make wonderful table decorations.