We have a multitude of cloth reusable bags that we use. Some are even "insulated" and have zippers for frozen food transporting. We purchased them at WalMart when they first had them available and have loved using them ever since.
The other half of the family keeps a couple in the saddlebag of his motorcycle and oftentimes has one hanging off the handlebar on the way home for that "last minute stop" for a container of milk etc.
Bags are washed, folded, and inserted into another bag after a grocery trip and ready to grab on the way out the door the next time we shop. MUCH easier to carry back into the house than the plastic, and the groceries don't roll around the van on the way home...
For a dollar investment each, (dollar and a half for the insulated ones with zippers) we've now used the same bags for going on two years, and they look practically new.
