Unique and powerful, Quick Clean Micro-Steam Bags eliminate 99.9% of all harmful bacteria and germs from most breastpump parts and feeding accessories. Fast - complete in just 3 minutes. Unique - faster than boiling and more effective than dishwashing. Easy-to-use- Just add water and heat in the microwave. EcoYesmical - 5 reusable bags per box (up to 20 uses per bag = 100 uses)