The Temptasia Breast Pump Cup, Large, is compatible and interchangeable with other Temptasia pumps and accessories. In use with a quality pump, it will bring temporary engorgement and heightened sensitivity as the pump system increases circulation to your breast. This cylinder is also detachable if you are seeking to hold the suction while you play. Made of body safe acrylic, the Breast Pump Cup is easy to use and easy to clean. Size: 4.75 Inch Diameter Cup.