So far lunch has been going really well for our 3-year-old at preschool. While she's not eating a lot (normally she eats what she wants), I'm happy she hasn't had any food allergic reactions. So happy. I'm going to try to take some pictures of lunches soon and share what's working for us. In the meantime, check out this lunch link (even if you don't have one in school -- it's pretty helpful). Of course, you need to adapt a little for food allergies.
Also, we are using these Ziploc containers and they are working wonderfully. They have three sections (2 small and 1 large) and the seal tight. Even if placed upside down the food doesn't mix. Very easy for her teacher to put on the table in front of her. And a lot less worry about food allergy cross contamination. These are cost effective, just under $3 for two and clean up really easily.
A little update
3 years ago