Luxury Erin Mills Content Sale › Glass Cake Dome with White Marble Base & Copper Knob Image 1 of 2 Image 2 of 2 Glass Cake Dome with White Marble Base & Copper Knob $50.00 A clear glass cake dome with a copper-tone finial, resting on a round white marble base. Add To Cart Added! A clear glass cake dome with a copper-tone finial, resting on a round white marble base.