This Double Electric Breast Pump Proven airlock protection helps protect breast milk and the baby from bacteria, mold, and viruses while pumping. Ameda has the world’s only breast pump kit with a proven protection barrier. Here on DynquestMedical.com, Purely Yours carry-all includes a dual Hygienic milk collection system with a microfiber carry all tote shoulder bag for easy and convenient transport. Also includes 4 milk collection bottles with lock-tight sealing lids and a Cool’N Carry milk storage tote to keep milk cool when on-the-go.