Rumble Tuff Slim Cups Hands-Free Collection Cups 15-17mmRumble Tuff Slim Cups Hands Free Collection Cups 5oz Capacity, Easy to Clean Experience discreet, convenient pumping with Rumble Tuff's Slim Cups Wearable Collection Cups. These low profile cups offer true hands free mobility while maintaining powerful suction and efficient milk collection. Key Benefits: Ultra Discreet Design Slimmer profile fits comfortably under clothing for subtle pumping anywhere Simplified Cleaning Just 3 parts for quick