There is a glass pocket inside the base of the decanter where you place ice. The ice never touches the wine! The ice pocket is used to keep wine chilled while not diluting the flavor. South American glass blowers create handmade works of art. This white wine decanter is a free form piece, not made from molds, but wonderful organic shapes that are thick and hefty. Best of all, the glass is recycled from old windows, automobile glass, and all sorts of bottles. Each design is one-of-a-kind, and yes, as always, you can count on unique variations in each piece. For after all... this is no ordinary wine decanter!