Recently, my husband and son cleaned the mini-van out and to my surprise my son came up with a wonderful idea! Years ago we bought a little mini trash can to put in our car. Unfortunately, it never really worked for our van because honestly, it was a bit small for our family of five...especially, when we are on road trips.
Below is a picture of his solution to our problem. This view is from the back seat of the van. As you can see, he slipped the handles of a plastic grocery bag over the two handles of the two front seats. This has been a genius solution to a problem we've had for a long time. All we have to do is take it off, tie it and throw it away when it's full...then replace it with another empty bag! The handles to the seats raise up so it's easy to slide right off!