Coop, I've posted a tutorial called "the five minute air layer" using foil which I like using very much. In hot weather though, the rooting medium tends to dry out very quickly with using foil necessitating frequent hydration using a syringe. I am hoping that the plastic container will keep moisture in longer.
BTW, your Dominic cuttings are now small trees which may produce a few figs by the fall. I hope the cuttings I sent you are doing just as well.
JDS, it is indeed a small container, but to paraphrase Goldilocks, just right for small caliber branches.