I don't know about you but I hate having to unload 20 bags of groceries that only hold a few items each. seems like it takes forever to haul them all in. I love using my own handmade fabric grocery bags. I keep material that is from clothing or scraps from fabric and make my own shopping bags. This way I am using my resources instead of the plastic bags that end up in the dump. You can make original bags that are gorgeous or just plain bags.
I also love the versatility of them. It makes me very happy to put my recycled material bags on the conveyor belt at the grocery store before I unload the groceries. I always ask them to pack the bags full. Also I find it so much easier to handle the groceries once I get home and have to unload.
So don't pitch that material. Make up some one of a kind grocery bags for your next shopping trip. It will make your experience so much easier.
I also use handles from discarded items or ties from clothing to make the handles. It is a breeze just to sew it onto the inside of the bag once it is finished.