MedelaÆs unique and powerful, Quick Clean Micro-Steam Bags are designed and tested for disinfecting breastpump parts and feeding accessories. Proven effective to eliminate harmful bacteria and germs by 99.9%. Steam cleaning eliminates 99.9% of most common bacteria and germs. Complete steam-cleaning in just 3 minutes - faster than boiling and more effective than dishwashing. Each bag will hold two breastshield and valve assemblies or two, 5 oz collection containers or bottles & caps. 5 reusable bags per box (up to 20 uses per bag = 100 uses). Perfect for cleaning pumping parts when a sink isnÆt available.