Sure you can. When I was experimenting wtih wine I made all kinds. Certainly did not want to make 5 galons of stuff I had no clue how it was going to taste, so I put them in 1 gal jugs. Must have had a dozen jugs in the closet.
How much are you making... I mean are you making a 5 gal batch and putting it in 5, 1 gal jugs?
Right now I am only doing 1 gallon batches....I don't have the room for more five gallon buckets (already have five or six around for my reef tank), or room for the bottles......
But I'm moving in a few months to an actual house....so I'll start brewing real batches then.
i've been thinking about doing half batches when i start all grain. i don't see why you can't do a 1 gallon batch! you could even do a little experament. take 1 gallon of a 5 gallon batch and age it for a little while in the 1 gallon jug, compair it to the rest of the batch and see just what aging does for the brew!!