I have been trying to figure out an economical way to make/buy reusable grocery bags. Did you know that some stores will actually give you money off of your total (like a coupon) for bringing in your own bags?
This could be a great way to make your own eco-friendly grocery bags:
Take an old t-shirt and cut off the sleeves and collar. Turn it inside out and hem down where you just cut and use a secure zig zag stitch the bottom closed. Turn it right side out and you have your eco-friendly shopping bag.
You can also use an old tank top, and depending on the size of the neck hole you may only have to sew up the bottom. It's a great way to reuse old clothes you'd rather not get rid of completely and reduce your plastic consumption.