Freemie Standard Collection Cups are closed-system and have a barrier inside them that protects the pump from milk back up. Standard Cups are designed for and work best with Freemie rechargeable pumps, including Liberty II, Independence II, and Rose. These cups hold 8 ounces of milk and feature:

Find the most current list of compatible pumps for Standard Cups here

NOTE: These cups look very much like the retired open-system Freemie Original Cups, but they are not the same product. Freemie Cup set parts are not cross-compatible and cannot be mixed and matched.