I've used these for conditioning before but never for primary. I want to do some smaller "experimental" batches. Anyone see a possible problem? http://www.midwestsupplies.com/kegging/kegging-systems/mini-draft-systems/1-tap-a-draft-bottle-and-cap.html
You mean using for primary fermentation? No reason you couldn't. I do mead in 1 gallon glass jugs for half that price. http://www.midwestsupplies.com/1-gallon-glass-jug.html just keep it covered
Not quite as big but I re-use 96 oz. glass jugs that held apple juice; as well as 64-66.7 oz. growlers. In other words things you are likely to own. Great way to experiment.
I use the 1 gallon glass jugs like StarRaptor, but I use mine for souring experiments and such. The work great.