Came up in Whirley pop since you can use those to roast coffee.
I did for a few years. First I used an earlier model Fresh Roast https://www.sweetmarias.com/fresh-roast-sr540.html
which is like an air popper redesigned for coffee. It was great, except it makes only a quarter of a pound at a time.
My nephew is a coffee roasting geek . He swears by the old air popcorn makers . The kind to get was the one without the temperature control thermostat. I believe he buys his beans from a place in Oakland to roast . Sweet Maria’s
He showed me what he used . It was the old circular ones . Yellow top . The popcorn, popped . And then I guess you were supposed to have the top become a serving bowl .
