Keeping food from shifting

The things we found that move around in the residential fridge were primarily condiments, like catsup, mustard, pickle relish, etc. We bought a plastic container about 5" x 10" by 3" tall and load all of the small items into this plastic container. We do drink soda, so I bought two more of the plastic containers that hold about 10 sodas each on their sides. These containers stay in place, so we load everything else around them. Most other items don't move.