You can recycle, donate or dispose of your old tub. If you're looking to give your used tub a second life, just be sure that there are no stains or cracks. Places like Habitat for Humanity's Habitat ReStore or local salvage stores will gladly accept your old bathtub (and sink or toilet from a bathroom remodel). It may be possible to have them pick it up. If your tub is too beat up to be donated, consider renting a dumpster to avoid multiple trips to the dump or waiting for bulk pickup.