An internal “boat” acts like a piston, pushing fluid out when the nozzle is depressed.
When the Refill Bottle or Refill Cartridge is refilled, the boat is pushed back down, and the Refill Bottle or Refill Cartridge is ready again to dispense fluid.
Each Refill Bottle and Refill Cartridge contains an inert gas which will last for its useful life. This gas is the motive force to dispense fluid. Each PerfectFlow Refill Bottle and Refill Cartridge is embedded with a wireless device. These wireless devices communicate with the Refill Station. They ensure that only the right amount of the right fluid goes into a Refill Bottle. They also allow the Refill Station to send “time to refill” and other information to an inventory management system.