A tray assembly for a device for freezing a liquid, the assembly includes a frame defining an aperture. A thermally conductive tray is sized to be received within the aperture, the thermally conductive tray having a body and a lip circumferentially disposed about the body, the thermally conductive tray being seated within the aperture and defining a first surface and an opposite second surface, the first surface defining a recess and the second surface defining a plurality of receptacles. A gasket is included and sized to surround the body and to be disposed between the lip and the frame. An insulation chamber is coupled to the frame.