Spin off from this thread.
What are some fictional products that have become real and are or were available for sale? In this case I’m not thinking of promotional items, but the actual goods, whatever they may be.
The first one that comes to mind is Duff Beer from the Simpsons. On the other hand, I’m pretty sure no Wagon Queen Family Trucksters (from National Lampoon’s Vacation) were ever sold. Can someone help a brother out with other examples?