See also boozehounds turning everclear into gin or whiskey overnight. Ultrasonic baths are going to be A Thing for consumer gizmos, in the near future, and then probably taper off.

First add a spoon of grounds or beans. Fill up your cup with water. Next is the fun part. Shake it for 20 thousand years at a few Hz or scream at your coffee as loud as possible for a few months.

Just in time for that energy to be funnelled into a data center!