Tortilla brands Mission and Guerrero, both run by Gruma Corporation, package their tortillas and tostadas in low-density polyethylene (LDPE) plastic bags. While technically recyclable, LDPE, identified by the #4 resin code, is not commonly collected in recycling programs.  The New Jersey-based upcycling company will take the tortilla packaging and use it to make new tortilla holders and other consumer products. It will also collect packaging from the companies' dips and salsas.