I was reading another Thread and thought of this question that's been on my mind for a while now.. What do you do with old, used tennis balls that you're probably not going to use again?? Recycle them somehow? Throw them in the trash? I'm not such an advanced or "fiscally liberal" tennis player that I open up a new can every time I play, but I still have a lot of used tennis balls lying around that I don't know what to do with.. I can't imagine how many tennis balls are used by advanced players in a month's time! Thanks in advance for any replies!