Hippity Hop Silver Paper Cups - Disposable 12oz Cups, Rose Gold Foil Drinking Cups for Cold Beverages, Party Decoration Supplies, Birthday, baby Shower, Anniversary, Wedding Pack of 10. DURABLE AND LEAK PROOF: Each cup is coated inside with leak-proof polyethylene film so guests can carry around and drink from their cups without worries. These cups are disposable and biodegradable.