This is the easiest thing you can do, just stop buying to Drop-in Liners and use your breast milk storage bags instead The nice this about doing it this way is that you don't have to worry about your drop-in liners being clean for your babies to eat. By using the storage bag you are guaranteeing that your babe is eating from a sterile environment because the bag was sterile when you opened it to add the milk and you dont have to transfer the milk to another container.
And the added bonus is you save $10 by not having to buy the Drop-ins in the 1st place.
Drop-in liner: $10 Breast Milk Storage bags: $10 Total = $20
Now it is only $10
The process is easy ...
Step 2: Insert the bag
Now slowly pull the edges down till the milk just barely reaches the top of the tub. This will help remove a lot of the air. But make sure the milk doesn't reach the edge because you take the chance of some of it spilling out.