This episode explores how a simple paper filter transformed the way the world drinks coffee. In the early 20th century, coffee was often bitter and cloudy, filled with grounds that settled at the bottom of the cup. Dissatisfied with this, a German housewife named Melitta Bentz searched for a better way to brew coffee at home.

In 1908, she experimented by placing blotting paper from her son’s notebook inside a perforated pot. The paper trapped the coffee grounds while allowing the liquid to pass through, producing a clear, smooth cup of coffee. Recognizing the value of her idea, Melitta patented the invention and founded a company that would later become a global coffee brand.

The paper coffee filter made coffee cleaner, more consistent, and easier to prepare. It helped standardize brewing, supported the rise of drip c ...