Bethesda will honor a Fallout 4 pre-order from a cheeky fan who sent in a box full of bottlecaps as payment, but haha, funny idea, please nobody else mail in boxes full of bottle caps. They're heavy, smelly, gross, and you have to wait until the post apocalypse for them to actually be worth anything.
An Imgur user going by GatorMacheteJr posted pictures of the cap motherlode, which he'd been saving up ever since he finished Fallout 3. It was 11.2 pounds of crimped metal and dried booze in all, and he packed it in a box and shipped it off to Bethesda, Maryland with a note humbly requesting a Fallout 4 pre-order - or failing that, the return of his "life savings." Apparently the shipping costs were quite steep because, again, heavy, and they probably made the whole delivery truck smell like stale beer.
