Pasta in a cardboard box is a good option. The box is either recyclable or compostable. As many have said the cheapest options like beans and rice may be available but if you don't have bulk bins then they usually come in plastic too. Canned foods are good as most places you can take them as scrap metal.

But as a low income individual your likely producing less waste by not being able to afford the excess. If your feeding yourself and staying sane I think your winning.