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Coffee Temperature Regulator

These stainless-steel capsules regulate the temperature of hot beverages, provided that you use them in a travel mug.

Published Mar. 1, 2013

What You Need To Know

Freshly brewed coffee can start out too hot to drink—and can too soon end up cold. Enter Coffee Joulies (“JOO-lees”), stainless steel capsules shaped like oversize coffee beans and filled with a proprietary material. The product promises to cool your coffee quickly to the ideal temperature (140 degrees) and keep it there.

We bought a set of Joulies for $49.95, which includes five J...