<human>:  How do I make the best cup of espresso?
<bot>: To make the best cup of espresso, start with high-quality beans. Make sure they are freshly ground and properly stored. Also, use pure, filtered, or bottled water and adjust the dose of espresso to your taste. Heat the brew vessel and cup before brewing, and use the right ratio of coffee and water. Finally, use a timer to get the perfect extraction time.