SAFETY BOILER CAP: Built-in safety valve prevents hot steam from escaping GLASS CARAFE: Includes 4-cup glass carafe to brew up to four espressos at once FROTHER: Adjustable steam output for perfectly frothing or steaming milk for cappuccinos and lattes EASY TO FILL: Use included carafe to pour the right amount of water into the boiler HOUSING: ABS plastic and stainless steel accents