The stoppers were used as marbles, or "alleys", easier to get hold of than the sissy shop bought ones. If I remember right they were called "washers". Ball bearings were called "bollies" and sometimes, if you played against bigger lads, the rules were implemented in their favour so they could win the lot off you. There were also "blood alleys" which were highly prized when they first came out. White glass with a red squiggle going through them.
Birkenhead........ God's own Room 101.