However, Sonoco has underperformed the Zacks classified Containers-Paper/Plastic sub-industry in the last one year, mainly due to material cost inflation and slowdown in manufacturing. Sonoco Products CompanySON has expanded its ClearGuard portfolio of flexible packaging to include pouches for liquid or more viscous products. In Apr 2017, Sonoco launched its ClearGuard packaging, which comes with a transparent look and can be used as a substitute to aluminum foil or metalized films.