I'm visiting Dallas in a couple weeks and wanting to get a growler fill or two. But since I don't live there, I have no interest in adding another growler to my collection, nor in paying for said growler. Will Whole Foods or The Bottle Shop fill any growlers (I have an unmarked 2-liter and a 2-liter marked with a brewery label)? From poking around the internet, I see something about the growler needing to have a government warning on it. Is this just a sticker they put on your growler, or what?