Plastic bags are made from NG, thus my comment. Certainly, the expandable cotton mesh bags that are quite strong and hold far more than thought are best; they are what I use.
I've been using the same woven-plastic bulk bags for almost twenty years! They're kind of cruddy looking, but my gosh what a fabulous use for plastic. I've saved hundreds if not thousands of paper bags and plastic bags by simply remembering to bring the old clunky woven-plastic bags to the store with me.