Chef World Stainless Steel Milk Shake Cup, Malt Cup, 30 Ounce, Commercial Grade Capacity: 30 Once volume Stainless Steel malt milkshake cup. Notches for use in Milk shake machines, Bottom lip for milkshake machine. Mirror-Polish stainless steel Commercial grade quality. It has a Rounded rim lip, and a Vertical holding groove on each side, Fits in most shake machines. Measures 4" diameter 7" height.