If you want less mess with your espresso making routine, add the Rocket Espresso Dosing Funnel to your toolkit. It has strong magnets hold this dosing funnel to your portafilter, so you don't have to worry about it falling off when you tap your portafilter to settle the ground or when you stir the grounds a little agressively. Add the Rocket Espresso Dosing Funnel to your arsenal to aid in your never ending battle against mess.