E-commerce has vastly increased the amount of cardboard we all use. Even if you recycle the cardboard box, it uses a lot more energy to remake a box than simply reuse it.
RePack is one solution to single use packaging. The mailers can be used multiple times. You can return a product to the shipper using the bag or simply return the mailer to RePack at no cost to you. They figure they can use the mailers 40 times. They’re made from recycled plastic and presumably can be recycled at the end of their life.
You can return something to Amazon by just bringing the product and label to a UPS store or Whole Foods. Why can’t you give them the box too?