Posted By:
Scott MBaseball wise, a lot of the ones already mentioned here... P-2 pins (need 5 more to go), Topps Coins, a jersey or two.
I had a neat collection of shot glasses from different NHL and MLB venues I've visited in the past but most of them broke during a move and I had to throw them out. I particularly liked the ones which had measures listed as single, double, triple, home run or 1st period, 2nd period, 3rd period, overtime 
Leon, if you are reading this and don't mind sharing, I would love to see a picture/scan of your Crofts bottle.
Scott