Open container laws-type question

[rbrav.livejournal.com]

Hello! My friends are I are doing a group costume involving hipster versions of known characters. We want to all have PBR cans as props. Obviously, people are buying drinks and walking around with them all the time, but those are usually in nondescript cups, and also inside. Just so we don't run afoul of open container laws or anything, does anyone know if there'd be a problem with us having PBR cans (either unopened or opened-but-empty) on our person inside and just outside the hotels?