All-Clad TK combines the sophisticated technology of the world's finest cookware with the expertise of today's most renowned chef. Inspired by Chef Thomas Keller, the TK collection offers cookware that empowers you to cook with more control and confidence. Only All-Clad, with its vast experience in metalcrafting, offers cookware hand-crafted with custom shapes and metal combinations for specific techniques in mind. Now, precise performance for every task is always at your fingertips. TK features flared edges for drip-free pouring. Shapes that nest and universal lids for easy storage. Beautiful, low-maintenance brushed stainless exteriors. The All-Clad TK Copper Core 2/3-Quart Butter Warmer is ideal for cooking soups, vegetables, beans and grains. Used for making sauces, reheating and melting.