
Instead of running back and forth between your espresso machine and your trash can, the knock box becomes a trash can. You don't really need a knock box, but there are more reasons to buy one than there are reasons not to buy one. Knocking the portafilter against the bar helps to get you a clean filter in almost no time at all. The moisture of the puck makes it get stuck inside the filter, and the puck is way too hot to go jamming your finger in there. What makes a knock box a knock box is a bar that runs horizontally across the box for you to bang your portafilter to expel the puck.Īfter you pull a shot, the puck is wet and hot. Ever since I got one, I haven't had to scurry to the trash can after every shot I pulled, and now it's time that you, an espresso machine owner, get one too.Ī knock box is a little box you set next to your espresso machine so that you can easily (and cleanly) throw away your pucks after every time you pull a shot. It didn't take me long to realize I needed a knock box. If you wanted to find your way to my trash can from my espresso machine, all you had to do was follow the drip, drip, drip on the floor.

And then I went to throw away the puck - the spent espresso grounds left in the portafilter - in my trash can. The first time I pulled a shot, I was ecstatic.

I had the best coffee beans, I perfected my ratios and I nailed the preparation. As an espresso lover, I was so incredibly amped to finally get an espresso machine (the Breville Barista Pro, for those wondering).
