The Infuser Mug also works great for making your own cold-brewed coffee or fruit infused water. Simply place a few scoops of coffee grounds (or fruit pieces, fresh mint, basil, cucumber, etc.) into the infuser basket. Pour clean filtered water into the mug, and let steep in the refrigerator overnight. The result is a customized, deliciously smooth cup of cold brew or healthy fruit-infused water, ready to go wherever you go!