Monday’s ad is for Ballantine Ale, from 1948. Using the Ballantine logo of three rings in a circus themed ad, this was a typical ad formula during this time period. One oddity: Either that’s a really tiny glass or it’s a nearly bottomless bottle of beer, because the glass is full, but the bottle is still more than two-thirds, possibly as much as three-quarters, full. That’s an impressive bottle. That seems more like a magic trick.
The glass & bottle look normal; the artist who drew it was clueless about volume.
In 1948 Ballantine Brewery had an executive named Charlie Geiger who was an avid circus fan and spent a lot of time visiting circuses and making friends with the performers. That may be part of the reason for the ad.