If you need to pack, you can charge one yuan for tableware.

You can buy the ordinary plastic bag together with the environmental protection bag, and then ask whether you need to buy an environmental protection bag or an ordinary plastic bag when you check out.

By comparison, the customer will find that the plastic bag is more cost-effective, and it is easy to ignore the value of the bag itself.

If he says no, you don't need to explain. If he continues to ask why the plastic bag is charged, he will say the national environmental protection requirements.