The Party Cup - Rainbow $16.99 Default Title - $16.99 Quantity Red Solo cups are for amateurs. Whether you're serving a Mai Tai or straight-up beer, The RAINBOW PARTY CUP will add panache to your party. Fred's classic-styled cups hold 16 ounces of your favorite beverage and are made of rainbow anodized steel. This product is currently sold out. Please fill in the form below if you'd like to be notified when it becomes available.