Coffee overflows after brewing attempt without a filter in São Paulo

On August 2, 2026, in São Paulo, Brazil, @jhenninocera_ shared a video of a coffee-making mishap while attempting to brew coffee without a filter. In the video, ground coffee is added directly to a glass kettle of boiling water on a gas stove. The mixture quickly foams and overflows, spilling onto the stovetop and creating a mess. The rapid bubbling is caused by the boiling water reacting with the coffee grounds, which provide countless tiny nucleation points that trigger the sudden release of steam bubbles and stabilize the rising foam. According to the author, they regularly record their coffee-making routine and happened to capture the unexpected overflow on camera.