We can see recycled packaging in action at Handzy Shop + Studio, which uses noissue Recycled Mailers. Aside from being made from recycled plastics, they contain another adhesive strip so the mailers can be resued once more. Sustainability of packaging materials
Corrugated packaging refers to box fibers made mainly from trees and old corrugated containers. According to corrugated.org, they can be used 7 to 10 times to make new packaging materials. In addition, "more corrugated packaging is recovered for recycling than any other packaging material."
Corrugated packaging is widely used in the industry, with numerous online merchants utilizing it to package and ship their products.
Here’s an example from Everyday Wine, which uses corrugated boxes for its wine bottles.