Rincon Bar & Prep Sink. A beloved original, Rincon proves that it's hip to be square. Great as a prep sink or a smaller bar sink, this simple, elegant, hammered copper sink is versatile in design and an incredible addition to any space. Rincon copper bar/prep sink, formerly called the Small Square, 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. **