Here are the top 10 packaging box companies in the USA, along with a brief introduction and their main products:

1. International Paper: International Paper is one of the largest packaging companies in the world, with a presence in over 25 countries. They produce a wide variety of packaging products, including corrugated boxes, paper bags, and packaging containers for food and beverage, healthcare, and retail industries.
2. WestRock: WestRock is a leading provider of packaging solutions in North America. They offer a range of products, including corrugated containers, folding cartons, and specialty packaging. They serve a variety of industries, including food and beverage, healthcare, and consumer goods.
3. Berry Global: Berry Global is a global manufacturer and marketer of plastic packaging products, such as bottles, containers, and films. They serve a wide range of industries, including food and beverage, pharmaceutical, and personal care.
4. Sealed Air: Sealed Air is a packaging company that specializes in food packaging, protective packaging, and hygiene and cleaning solutions. They offer a wide range of products, including Bubble Wrap, foam, and vacuum packaging.
5. Amcor: Amcor is a global leader in flexible and rigid packaging solutions, offering a variety of products, including bottles, cans, and pouches. They serve a range of industries, including food and beverage, healthcare, and personal care.
6. Graphic Packaging: Graphic Packaging is a provider of paper-based packaging solutions, serving the food and beverage, household, and personal care industries. They produce a range of products, including folding cartons, beverage carriers, and paperboard.
7. KapStone: KapStone is a producer of unbleached kraft paper and packaging products, such as corrugated boxes and folding cartons. They serve a variety of industries, including agriculture, automotive, and retail.
8. PCA: Packaging Corporation of America (PCA) is one of the largest producers of containerboard and corrugated packaging products in the US. They offer a range of products, including corrugated boxes, folding cartons, and packaging containers for the food and beverage industry.
9. Sonoco: Sonoco is a global provider of consumer packaging, industrial products, and protective packaging solutions. They offer a variety of products, including paperboard, tubes, and composite cans.
10. Menasha: Menasha is a provider of retail packaging, merchandising, and supply chain solutions. They offer a range of products, including folding cartons, POP displays, and retail packaging.

Each of these companies has a unique approach to packaging, offering a variety of products to meet the needs of different industries. They all focus on providing high-quality, sustainable packaging solutions that meet the changing needs of customers and consumers alike.