Remove the stopper from the bottom and fill with water from the bottom inlet (keep it at an appropriate angle), place in the freezer and chill. Then enjoy your cold drink.No need to plug in,only need to put it in the freezer of the refrigerator for More than 10 hours, After taking it out, pour in a drink or juice,get a smoothie milkshake.Drinks can be arbitrarily matched according to your preferences.