Compatibility: Specifically designed for Single Serve Grounds and compatible models such as ES601, ES655, and ES. Be sure to check compatibility before for an brewing experience. Filtration and flavor: Activated carbon filters remove impurities and calcium deposits, helping preserve rich flavor in every cup. Ecoconscious design: Made from sustainable materials; improves beverage quality and reduces environmental waste. Size and fit: Compact, singleserve filter designed to fit compatible singleserve machines. Use scenarios: Home use with ES601 or ES655 to enjoy cleaner water and enhanced flavor in daily coffee. Office or breakroom use to maintain consistent taste across multiple cups and protect machines from mineral buildup. Travel or guest scenarios with compatible machines to maintain coffee quality away from home.