Don't tell me you haven't gone through IKEA and picked up a bag of these! (I've seen them at other stores too). I've done so at least twice, by looking through the sheer amount of them in my kitchen drawers. So handy, I love them!
I discovered food bag clips about 5-6 years ago. I was at someone's home and saw a bag clip around an opened bag and was amazed that I had somehow completely missed them in stores. I had been using office fold back clips but these are so much cuter! And they too come in different sizes and colors.
I heart kitchen gadgets.