What is the ruling on money acquired from collecting empty cans from the streets, including alcoholic beverage cans, and selling them for money?

It is permissible to sell empty containers, even if they were for alcoholic beverages, unless the seller knows or has a strong suspicion that they will be reused to package prohibited substances. In that case, it is not permissible because it falls under cooperation in sin. It is preferable to sell them to factories that produce halal food and beverages.