In our pantry, open bags have to share bag clips.  I think my wife and I only have two or three bag clips between us (and at least one of them is actually a clothes pin).  However, we have dozens of another type of utensil to spare, and they work just as well at keeping our chips from going stale...

I guess the main message here is: The next time your pen runs out of ink, don't throw it away; instead, relocate it to the kitchen!