Originally Posted by shabedue
Thanks @wailingguitar. That's an awesome idea.
I looked up propylene glycol and it definitely a better choice. I think I would probably have been ok with ethylene glycol because it's metabolites are able to be filtered out in humans, thus requiring a much greater concentration to be leathal to humans than dogs, but its always better safe than sorry.
Out of curiosity I looked up the toxicity report on ethylene glycol for humans and it seems the lowest published lethal dose for humans is about 750 mg/kg, or about an ounce and a half for a grown man. Not something you want to play with. Even at smaller doses, kidney damage is a b****.
Other than that, what you're describing should definitely work fine. I'd be a little cautious about clear lines for the beer, though, as it doesn't take long to skunk up even a line's worth of beer in the right lighting conditions. If you're keeping the bar covered when it's not being used, though, it should be fine for short stints. Otherwise, you'll be dumping your first few ounces every time.