There used to be a coffee shop in my town that would encourage customers to bring in their own reusable cups/mugs. Customers that did were served their drink in a glass carafe that they could then pour into their own cup. (I believe it was done that way to comply with sanitation/health code since they can't be certain that customers had cleaned their cups.) They had a 50¢ discount for those customers and they sold their own branded mugs/cups for like $5-10.
They didn't make much on their coffee unfortunately and relied mostly on tips to take care of the baristas so the pandemic took them out of business.
This is excellent. I'm not sure I can describe it in any other way.