Sometimes you have leftovers. Sometimes you want to store those leftovers. Here are a few things that we are currently using at Casa de Craftycakewagon.
Glad Press-n- Seal Wrap: I love this stuff. Whoever invented this is a genius! Yeah, it's normally about $6/roll, way more than those crappy other plastic wraps, but it actually works. If you are lucky, you can score a deal after the holidays and get discounted "holiday" wrap- who cares if it has candy canes on it?
I'm not even sure who introduced me to this stuff; I think someone brought something to a party with this as a cover. It actually keeps things inside of a container (within reason) and keeps food fresh. You don't need a rubber band, or multiple attempts to use it, it's just like a giant sticker! (Full disclosure: No one paid me to say this. I just really like it.)
In effort to use less plastic for storing food, I have obtained a few ceramic bowls with lids from places like TJ Maxx and Homegoods. They are nice because they all seem to have vents in the lids for microwaving, and I know that chemicals are kept out of our food. We also seem to go through an inordinate amount of Bonne Maman jam around here, so I've saved those jars for a while now. They are good for storing small bits of leftovers or sauces, and sometimes almond bark.