It actually looks like the center post in the carto is bigger than my other cartos(from the same supplier). I also have another carto from them, some undefined nasty desert flavor that was a freebie. And that does not fit, and has the same large center post. The vanilla freebie I got fits fine, as do the 555 closeout cartos I got for $4 a pack. I know this is not V4Ls fault, I just thought someone viewing this forum might have experienced this before.