I use plastic shopping bags for trash, so I save them all. This weekend was mega winter cleaning, and i was getting annoyed with how much room they took up. I remembered my friend had a plastic tube that she shoved them in that stuck to the back of her cabinet door.
I went to KMart, no luck finding one, but I think I cracked the sales guy up when I asked for 'the tubey thingie that sticks to doors for bags'.
As I walked home thinking how to velcro a tube on my cabinet, i passed the FedEx store - VOILA!!!!!
Step one - cut to the height you need, and then fold inside out.
Step two - staple the sides together, then use the sticky strip and stick that to your door to hold it.
I was going to make it look cute and spray paint it before I put it on the door, but I didn't have time...