I grew up on 173 St & St. Nick. in Washington Heights back in the early sixties. Bottle caps with the melted crayons were cool, but for maximum speed and ease of shooting we used to rub the very top of the old glass soda bottles over the sewer covers until they broke off. Of coarse sooner or later someone would hit you hard enough to break it, but those old time bottles were pretty thick! Man this stuff sure brings back the memories!!!