We tested the Puck Sucker and liked it, though we can't universally recommend the knock box. Go into a coffee shop and you’ll hear the thwacking of baristas knocking out spent espresso pucks.

Whacking a spent espresso puck into a trashcan is a particularly unpleasant experience. It's much better to buy a dedicated knock box. Our favorite from homeffect has a pad at the front that's ...