Supply refers to the amount of milk you can provide. Your milk supply depends on how often you nurse or pump your breasts. The more you breastfeed or pump, the more milk your body makes.

The flange is the part of the breast pump that comes in contact with your body when placed onto the breast and nipple, forming a vacuum seal with the areola. It's shaped like a funnel.

A freezer stash is extra breast milk collected by pumping that lives in your freezer. Beware: do not get intimdiated by someone else's freezer stash.

Using expressed milk via bottles.

The act of expressing or pumping your milk out, generally with the use of a pumping tool. This handy tool not only allows you to fill a bottle with your precious milk, but it can also help maintain your milk supply, relieve engorgement and create a backup stash for your freezer.