Is it permissible for a seller of nylon bags to sell them to a shop owner who sells both permissible and impermissible goods, such as alcohol?

Selling bags to those who will use them for both lawful and unlawful purposes is permissible, unless the seller knows that the buyer will use them for unlawful purposes. In this case, there is no objection to selling bags to the owner of a shop that sells alcohol, due to the impossibility of knowing the buyer's intention.