These glow dessert cups are the perfect way to end your nighttime picnic or get-together. Imagine presenting your special tasty concoction in a cup that contains embedded liquid glow that swirls and twirls around the cup! The glow lasts up to 8 hours! Perfect for a fruit cup, ice cream scoop, or even use it as a great conversation-starting way to begin your meal with a shrimp cocktail or appetizer! Each cup holds 4 ounces. Each set includes one blue, one green, one yellow, and one red glow cup, plus an activator piece. Glow is intended for one-time use only. Not dishwasher or microwave safe. Non-toxic, FDA approved.