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 ...

Researchers from the University of Campinas (Campinas, Brazil) and the Waters Research Center (Budapest, Hungary) introduced ...

There’s something truly calming about the slow pour of espresso over perfectly whipped milk. This layered coffee is not just a drink — it’s a satisfying sensory moment in a glass. Watch the ...

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