Your description leaves a lot to be desired, so I’m not really sure what you’re trying to illustrate here, but I will offer that Budweiser (and many other brewers and other consumer goods makers) does often use seasonal and regionally specific packaging. It wouldn’t surprise me if that was the case here.
In Chicago several brands, Bud included, use various versions of Cubs packaging. Bud Light bottles used to have a silhouette of the Chicago skyline in the field behind the logo on each bottle.
Still, something just saying “Budweiser Milwaukee” seems to lack enough creativity to make me wonder if there’s a different reason here. Of course if done stylistically, or if the OPs description is just lacking in enough detail, it could be perfectly typical.