Ameda breast pumps use the HygieniKit as the milk collection system. The HygieniKit is easy to clean and assemble. Kits are BPA & DEHP free. The kits are designed to protect your breast milk, kit tubing and pump from potential contaminants like bacteria and viruses while pumping. You can pump into directly into the standard tread bottle or storage bags. They can be converted into a Manual pump. The dual HygieniKit has 2 of each item.