3 different size of Cone-shape mug heaters, all round mug including 1.5 oz. and 2.5 oz. shot glasses, 12 oz. and 17 oz. latte mugs. All these 3 cone-shape mug heaters are workable with ARC mug press. And the 12 oz. and 17 oz. mug heaters can fit on BJ890 also.