Cocina 24 Undermount Kitchen Sink. Cocina 24 is a deep, single bowl kitchen sink crafted by Artisans to bring out the rich patina of the hammered copper. Perfectly sized for a small kitchen or bar, or as a secondary sink in a larger kitchen. Cocina 24 copper kitchen sink, formerly called Bistro, is artisan crafted; forged of high-quality recycled copper. Due to their handcrafted nature, no two products will be exactly the same and may vary in finish, texture and other details.