One of the best feeders for ant colonies, flightless fruit flies can be cultured using a culture medium and some sot of surface area.
Fresh fruit fly cultures will come with around 30-50 flies. They will be ready for use in 3-4 weeks, when fruit flies start emerging
Mature Fruit Fly Cultures will come ready-to-use
For culture media, we use bananas + oats + yeast + cinnamon + apple cider vinegar