It may have been one of those wax paper tattoo things. I mean I don't even know if pepsi makes those but if they do and one got stuck on the lobster claw then it would be a pretty decent temporary taboo. I mean it even looks like the picture pealed away just like temporary tattoos peal away (and trust me, they will stick to pretty much anything once wet)

Only problem is that it does not appear that pepsi makes temporary tattoos that look like that.