I “invented” the glass bottle cap described in earlier messages (i.e. the glass ring at the lip of a bottle which can be broken off if scraped just right over a sewer cover) Actually, it was discovered by accident, but as soon as we saw the glass ring we knew it would be perfect for Skully. This amazing discovery occurred on Walton Ave. in the Bronx circa 1965. Of course, it is possible that others developed this technology independently. Does anyone recall seeing a glass bottle cap in use pre-’65?