I've got one or two quart-sized jugs, a two-quart jug and a B-I-G one I can hardly lift! (The little have a deposit of 1/- on them!) Photos I've seen of jug bands usually feature tin jugs, which must be quite a bit lighter. I've never quite matered the art myself, but it's a kind of raspberry -- if you can vary the pitch a bit to do a simple bass accompaniment -- and the jug resonates to boost the sound. I suspect it helps if you empty the jug p[ersonally before playing; at least you won't be so worried about how it sounds!

Steve