1. Wash all of the pieces thoroughly and let dry.
2. Determine an order for putting the pieces together by dry fitting the jug together, to allow the last piece to fit (some piece orders, it is impossible to get the last piece in, so don't get screwed)
3. Use normal elmer's glue to put the pieces together ONE BY ONE in the order that you dry fitted the jug together. Hold each pair pieces together for a long time until the glue sets, wiping the excess away from the outer surface of the jug with a slightly dry rag. I like to let each pair of pieces sit overnight before I try to attach the next piece.
I used this method on a stoneware crock that was dug, made banner on Tnet and sold for a very nice sum. The benefit of this method is that it is completely reversible with a water soak. Elmers ain't no kindergarten glue when it comes to stoneware. I have some pieces which weigh 40 lbs and are completely held together with Elmer's glue.
Would love to see a photo of it afterward!