The Best Double Wall Espresso Cups: Ranked by Thermal Physics, Crema Optics, and Daily Workflow
The best double wall espresso cups do more than make your shot look like it’s floating in mid-air. Thermal retention, borosilicate seal integrity, portafilter clearance, and crema optics separate the daily workhorses from the pretty shelf pieces-and the differences show up fast once you start testing.
