Portafilter baskets are a crucial part of the espresso machine. Baristas often spend hours trying to work out the ideal basket for their machine, coffee and choice of espresso based beverage.  It is common to differentiate baskets based on capacity, however this can cause confusion, as basket capacity will vary depending on many factors such a roast profile, grind settings, dosing and tamping style, and machine setup. As such a 14 gram basket can vary from 14 to 21 grams depending on these factors.