Evaluation of the Functionality of a Fluid Filled Single Breast Pump

Inclusion criteria: * Female over 18 years * Participant has an established milk flow, general rule: approx. 50 ml per breast per pumping session * The participant is pumping at least 2 times a week * The participant is 1-6 months after giving birth (postpartum) at the day of data assessment * The participant agrees to pump or feed the last time a minimum of 3 hours before the start of the pumping sessions * The participant agrees that the pumped breast milk cannot be fed to her infant (will be disposed) * The participant agrees to photograph and video record the breast and upper body (no face) * The participant agrees to the presence of up to 3 men in the room during the pumping session Exclusion criteria: * Participant or their baby is dependent on life-sustaining electric devices (e.g. heart pacemaker, insulin pump, etc.) * Participant has an medical condition of the breast * Participant is allergic to plastics or silicone