I directly thought about Hackspaces (https://en.wikipedia.org/wiki/Hackerspace) around the world. Our local Hackspace (and I think a lot more) are selling products of all kinds to visitors.
I think it would be the ideal spot to sell timesaving food to the right type of customers. As jimmyjoy-plennyshake would line along with things like “guaranabrause” (soda powder with A LOT of guarana) aso.
I’m not a member of our local hackspace, but if you want to contact them for questions about retail, you can do it here: https://mainframe.io/contact.en.dark.html