Green solo cups are the perfect cups for outdoor events such as picnics, parties or catered events. These 12 oz. solo cups add a vibrant color to your events without breaking the bank, and are a cost-effective option for concession stand owners and caterers! Solo cups are made of a durable polystyrene plastic material, and can stand up to your most competitive party games. Are you looking for solo cups in other colors besides green? No problem! Choose from a variety of other plastic cups in solid colors such as black, blue, and red.