The garbage bin is one of the most wonderful inventions ever. Why? Because it is a good punitive measure when you want to show your displeasure towards someone else's actions. For example, if you see a kid twirling his pen when you are talking to him and he's obviously not listening, your eyes will search for the silhouette of the bin and you start doing mental calculations for the distance and force at which you will dump his pen in. Oh well, at least I believe that my throwing skills have improved tremendously. Well, the garbage bin is also a good tool of my repertoire of "scare tactics". It is especially effective when it is used on someone younger and less powerful than you. Jealous at the kid's funky looking pen? Threaten to throw it away at the slightest provocation with the excuse that such pens simply encourage materialism. Why else is the bin the best invention? Well, the egoistic freak whose pen is tossed into the bin for some good reason will finally know the meaning of humility when he has to grovel in the bin for his fragrant-turned-stinky pen.
With the above reasons, I rest my case as to why the bin is the best invention ever :P