I've used all manner of things to make household doorstops.  Some work better than others (I tried using a DVD case once, and it broke in half).  Of everything I've tried, this one makes the most sense.

It's another classic case of taking one thing and finding a new use for it.  Today, we're talking about a hand towel!

Just keep in mind, this particular doorstop works best on carpet, with not-too-heavy doors.  Check it out!