Ikea has marvelous little rubbery molds for fancy ice cubes, if any of you happen to go by there. And I picked up some heart-shaped molds at a local craft store for a song just after Valentine's Day.

Small dixie cups might make good disposable molds. I'd try muffin trays, too. Or just about anything with a depression could be worth trying, really -- unlike candlemaking, cleanup is not a big deal if some of the bath-bomb stuff gets stuck in the mold, because the stuff washes right out. (Fizz!)

-- Cam