Sharon,
An O-ting is a black rubber ring. They come in all sizes at virtually every small harware store, usually about 25 cents. I put a small hook into the edge of the
fridge door and clip the O ring over the top of the standard
fridge door lock..
I'll post a picture in the morning.
My fridge has a little swing plastic piece that's supposed to hold the fridge closed when traveling but after 22 years.....