An evaporating colloidal particle–laden droplet leaves behind a ring-like residue after drying. We routinely observe this ubiquitous phenomenon for dried coffee drops; thus, it is known as the "coffee ...

This story originally appeared in the July 2025 issue of Town&Gown magazine. As the sun rises each day in Philipsburg, the “council of elders” gathers over breakfast, cups of coffee and freshly baked ...

Across the United States, cafes are serving jumbo-size coffee drinks in plastic buckets. The gimmick is working.

Tea and coffee stains on your mugs don't have to be permanent. Here's why they happen and how to get rid of them fast.