Just add coarse-ground coffee into the mesh filter, pour water into the pitcher, screw the lid on (with the filter attached and submerged in the water), let it brew for 12–24 hours, and serve. You can pour it straight over ice cubes, or cut it with water or milk. Read our review of the Tayeka cold brew maker!
Promising review: “Bought this for my wife, and now I have become a cold-brew expert. Easy to use, easy to clean, and makes incredible-tasting coffee. This process removes all the bitterness and is easily our favorite way to enjoy our favorite drink. For the price you have to pay for cold brew at fancy coffee shops, this thing pays for itself pretty quickly. Try this once, and you’ll love it.” —Mark C
Get it from Amazon for $17.99.