The Hario Mizudashi Cold Brew Coffee Maker is the easiest way to enjoy cold brew coffee at home; simply fill in the filter cone with your favourite coffee, add room temperature spring water into the pot and stir the top grounds to let the coffee soak into the water fully. Once the coffee grounds are wet, store the cold brew pot in the refrigerator and leave it for at least 8 hours. Then, take the mesh filter out and drain it.
 
The flavors from the coffee grounds are slowly extracted over the course of a few hours as the grounds and water steep together. This means that cold brew coffee has up to 66% less acidity and bitterness. The flavors you can taste are presented differently than they would be in hot coffee. They’re smoother, less abrasive.