Originally Posted by android
you should be able to find those 1 gallon jugs at your LHBS. if not, buy some cheapo carlo rossi wine, dump or cook with the wine, and use the glass jug for fermenting. also you can sometimes find apple juice in those 1 gallon jugs.
If you're only major goal is to see the difference in different dry hop flavors, you can use apple cider made straight in these different jugs, too. Cider has a very clean flavor, too, which will make certain the different hop flavors jump out.
Cider's real easy, too. Get a little corn sugar, stir it in, and add some dry yeast.
After the krausen drops, dry hop a cone or a few pellets, and see what you smell.