Capsule tree magnetically helps you to clean away while the party is going on. How often have you not thought "where do all the caps come from" after the party is over? Now you can wake up and know that the caps are in order and you can also see how many bottled beers were consumed!
And it's a perfect activity at the after-party - get everyone involved in the cleaning by decorating the tree with cap after cap.
Complete with a small lawn that you absolutely should NOT fiddle with.