Eco-conscious: Cloth Grocery Bags
Rawhide on cloth grocery bags:
I wound up buying these bags since they were lightweight, under $15, and could stand on their own.
Overall, I've found them quite nice. The nicest thing is that even a large grocery trip fits in 4 bags, so it's just easier to move them from the cart to the car and the car to the house. They do stand on their own, though they have to be fully open and placed down with a modicum of care; I guess they are exactly like paper grocery bags in this regard.
Baggers deal with them fine, though I have to thrust the bags on them. I've never had one really notice the bags until I plop them down. Even then they sometimes reach for the plastic out of habit.