Practically, you can have a qualified halal product with every raw material certified, and if it comes into contact with packaging that is not halal, the product will not be considered halal.
The largest opportunity for packaging suppliers is to supply companies that already hold halal certification. Those programs increasingly require certified suppliers, and virtually every certified company needs some form of packaging.
Retail food-contact items include plastic containers, glass jars and bottles, aluminum foil, wax and parchment paper, cling film, ziplock bags, paper bags, cardboard boxes, styrofoam containers, tin cans, plastic bottles, and plastic and paper cups.