[Universal Adapter - Two common baby neck bottle sizes adopted with integrative part widely compatible with most breastmilk pump brand Direct Milk - From pump directly to the bag less procedure for less risk to the baby and less waste for mommy Rotary Design - Rotate to get your best position and it works more effective not letting bags affect your performance Pump to Bottle - Connect different neck-size breast pumps and bottles with conjunction parts on our bag adapter no need to change new bottle for new pump 30Pcs Storage Bag - Coming with 30Pcs milk storage bags for tutorial users who can have a tried-on bag storing milk for baby feeding to decide to buy more bags。 Never too late to regret]