If you are interested in vending machines but are up for lighter fantasy there is a light novel called: "Reborn as a Vending Machine, I Now Wander the Dungeon"

If you are interested in vending machines but are up for lighter fantasy there is a light novel called: "Reborn as a Vending Machine, I Now Wander the Dungeon" It has lot's of weird vending machines woven into it's plot. As an LN of the from the "being reborn in another world" genre (Yes that is a thing) it sadly couldn't do without some suggestive scenes but you skip those.