The lever system uses a small handle on top of the pot instead of a button. Much like the button, the handle is pressed downward until the thirsty customer has a full cup. If the cup does not fill all the way the first time, the use must wait for the handle to move back to its top position on its own. Simply lifting the handle will not create the vacuum affect that needs to happen in order for there to be pressure on the interior to dispense the drink.