My boyfriend recently noticed my grocery bag dispenser, which I bought at the 'everythings $1' store years ago. It's a simple square of cloth, sewn together like a tube with elastic on the bottom. You put those plastic grocery bags in the top and fish one out with your finger from the bottom. It's a handy little place to store grocery bags, which I prefer to recycle rather than throw them away. It really is a pretty cool cheap-ass gadget. He marveled at it and said, "you could knit this".
"Of course I can," I told him.
So I chose the cheapest, gawdiest yarn I could find (Red Heart Super Saver, in Bikini) and cast on a tube. Admittedly, I should have started with a few rounds of garter stitch, but I wasn't thinking at the time. I fixed the resulting curl by putting in a drawstring at the top (it's Ticker Tape, in case you're wondering), from which it hangs.