Hario Immersion Dripper SWITCH - Server SetUnlike traditional V60 drippers with which coffee is extracted through the constant pouring of hot water, this dripper is specifically made for immersion extraction. The metal ball placed at the base of the dripper blocks water from flowing through, allowing the poured water to stay inside the dripper for 2 minutes. Then, with the push of a button, the coffee flows down into the coffee cup, allowing for easy, even coffee extraction. Both the 02 and 03