Stainless Steel Coop Cups with Steel Clamp Holders are ideal for any cage and can be secured with the bracket and wing nut. Classic Products Stainless Steel Coop Cups with Steel Clamp Holders has a bolt clamp attachment and help these cups fit securely to the side of the cage. Made of rust-proof, scratch-proof, and chew-resistant stainless steel that’s easy to clean. Sizes are approximate. The bracket, bolt, and wing nut are painted.