I would like a keg set up but can't afford one any time soon. I have a bunch of empty growlers laying around and was thinking I could turn them into a bunch of mini casks. I was thinking I could rig up some kind of cap with a tube extending to the bottom of the growler/cask and another tube extending maybe an inch, both with some sort of valve. Fill 'em, prime as you would a cask and flip 'em upside down to condition. Then I wouldn't have to bottle (much) and I'd have a bunch of casks "on tap" that could be emptied before going bad. The growlers are thick brown glass that, I'm pretty sure, could stand up to the pressures of carbonating in a bottle and they wouldn't be getting that much pressure anyway as I'd be going for a cask style carbonation. I figured someone would have done something like this already but I can't find any info. I would love some feedback especially on how to make a suitable cap. Thanks.