My real question for you: must I pack the kids' food items in plastic? I am avoiding plastic when feasible for environmental reasons (the world is ending! oh sorry, didn't mean to break out the doom). When I pack my own lunch for my job, I can use glass jars and act accordingly with my lunch box, but glass is an iffy idea for kids' lunches.
Last year, we packed Genevieve's food in whatever plastic bags and containers we had around. I even trained her to bring the bags back home for me to wash instead of throwing them away.
Here's the kicker: my sister, with a little eye-rolling, just invited me to a Tupperware party. Should I buy some handy plastic containers? Seriously, give me some green lunch-packing advice.