Bag Holder

So, my wife and I tend to keep our plastic bags from the store, and we use them for our bathroom and bedroom trash cans. I saw an advertisement for something that attached on the kitchen cabinets, and thought, "I could make my own!" (Isn't that how it always works?)

Anyway, I'm sure this design can be improved, but as you can see in the image, it functions! It's pretty sturdy too, but I haven't performed a stress test to see how many pounds it'd hold. I'm guessing the bag might slip out bef