See what's going on inside that portafilter! Switch to a bottomless portafilter and get better visibility into every espresso shot extraction. Without the bottom of the portafilter in the way, you can see where any channels are coming from and work on improving your espresso shots. You can also increase your dose by getting a deeper basket that wouldn't fit in the standard portafilter. And that open bottom is so much easier to keep sparkling clean!