Simply press the rim of your pitcher or cup against the star-shaped base to engage the nozzle. After just 1-3 seconds, your pitcher is rinsed of milk deposits and ready for your next drink. The Rinser could be shutdown once you take off the vessels. Water saving more than 70%, also won't freeze your hand in winter. Great cup washing tool for your bar, cafe, restaurant, pub, household, tea shops, hotel,etc. No power.