Oh, I think you meant, what do I put in the red-topped Rubbermaid Easy Find Lids containers? Amazon.com: Rubbermaid Easy Find Lid 24-Piece Food Storage Container Set: Home & Kitchen
I use the big ones as salad bowls. I eat 2 big salads per day. I use them as mixing bowls for pancakes, etc. I use the smaller ones to store leftovers or as bowls for cereal. It's really handy to have the lids while camping 'cause you are always moving back and forth from the camper to the picnic table. I also use the containers to pack our daily lunch in our day packs.
PS I have a favorite holder for raw (or cooked) eggs. The Snap-N-Stack Egg container The Container Store > Snap 'N Stack Egg-Tainer