Unlike conventional V60 drippers, where coffee is extracted by continuously pouring hot water, this dripper is specifically designed for immersion extraction. The metal ball at the bottom of the dripper prevents water from flowing through, allowing the water poured in to remain in the dripper. At the push of a button, the coffee then flows down into the cup, enabling an easy and even extraction. The package includes 1 pack of V60 filter paper (40 pieces).