Or should it be the ZIP code with its own soap? At any rate, the Austin Natural Soap company makes 78704 (78704-scented? -flavored?) soap. On line it’s listed as a component of the Austin Power soap selection, along with bars called Night on 6th, Barton Springs Eternal, Hippie Hollow, Silicon Cowboy, and Tie-Dye. As described where sold separately, 78704 soap may be made from the combined scrag-ends of other soaps. This soap was seen at the south Central Market today and was new to me.