Migros responded to one of the dozens of inquiries like this: ... Thank you for your interest in working with Migros. For an initial assessment, we need a brief introduction to your company and your products. Please send us your documents directly to our contact form: https://www.migros.ch/de/services/kundendienst/infoline/produkt.html We will then forward your documents to the relevant department in Purchasing. ~~~~~~~~~~~~~~~ Or like this: Do you have a product idea of your own? Then you are welcome to present it here on Migipedia :) If you already have a finished product that you would like to present to Migros, you are welcome to present it to us via the contact form: https://www.migros.ch/de/services/kundendienst/infoline/kontakt.html
...as long as it's about selling the product through Migros at all. That's not clear from the question. It looks more like this: I have a tea bag that I don't need, so I want to sell it - how do you do that?