Rogue Brewery packages their Dead Guy Ale in a 1/2 Gall. growler. Does anybody know if this beer is bottle conditioned? Do they use a special seal or process in order to use a screw-off lid? What I'm getting at is, can these be used for bottling homebrew? I've been thinking of getting some flippy top growlers, but they are crazy expensive - if it'd work, why not get some beer for about the same price? Appreciate any info.