I used a glue gun, pushing the trigger and stick at the same time (made it go fast). I molded one of those containers you get in toy dispensers.
I did it, but it was so hard... it took me a long time to pry apart the mold. Then I put Glad wrap in it and over that aluminum foil, then I put in more glue to mold. Unfortunately, not all of the foil came off of the molded object...