sentences:  Another factor that reinforced the nexus between pubs and problem drinking was the fact that, until the late 20th century in most parts of Australia, alcohol could usually only be purchased over the counter at the pub, and the types and amount of alcohol that could be sold was also restricted.The pub-based bottle shop "bottle-o", usually one of the smaller bars converted into a sales area for bottled and canned drinks, is now commonplace in Australian pubs, but these only began to appear in the 1960s.These were followed by specialist "sales-only" retail outlet chains where alcohol is not served on the premises.