Evenflo Company One-hand Breast Pump or Hygienikit Collection System, Sterile, BPA and DEHP Free The exclusive patented Ameda Hygienikit, creates one of the vital effective milk collection systems to be had lately. It is helping mothers give you the purest milk imaginable to their young children. The kit’s unique silicone diaphragm acts as a barrier, separating the user from the suction source. This is helping ensure that milk purity by preventing contaminants from coming in contact with collected breast milk and stops milk back-up so tubing and pump require little to no upkeep. It also easily converts to manual pumping with the One-Hand Breast Pump.