Linkasink produces some of the world's most beautiful copper kitchen sinks. All are handmade for a distinctive, one of a kind product. Each sink is an individual work of art that is not only beautiful, but functional and easy to maintain. The Linkasink CO20 farmhouse model is the most popular copper kitchen sink. See all Linkasink Copper Kitchen Sinks. Linkasink is an innovator in the field of handcrafted sinks featuring unique designs and materials such as copper, marble, carved porcelain and cloisonné.