Thanks for posting this, I meant to reply sooner. This is a great idea for the milk allergic. My dd is a teen with milk as one of her allergies and this could definitely work so she could have her own take along milk free "pizza". She is MA, PA, TN, and sesame.
Few questions,
What type of flat bread do you use? I think flat bread would be similar to pita bread for ingredients?
What brand of pizza sauce do you use or do you make your own?
I am going to look for those containers at Target.