Too coarse a grind, too little coffee, or insufficiently tamping the grounds before brewing can all lead to inadequate pressure for a proper brew. 2)It is important to note that the amount of espresso extracted will vary depending on the grind size and amount and reprogramming may be needed when the size and amount are adjusted Made with Durable Aluminum that Keeps Coffee Warm, Hand Wash Only 3-Cup Capacity with Cool Touch Handle and Knob for easy handling It's Small and Portable Design Makes it Easy for Sharing Designed with a Flip up Top and Side Pour Spout for Easy Serving Ideal when Making Espresso Detaches for Easy Cleaning after using