My new YouTube Channel: https://www.youtube.com/channel/UCnnw56J_TeOsF4M_F5pPPJQ
This is probably only large enough to take a sandwich and a Capri-Sun, or a Lunchable... but hey! You can store other things in it too! I'll upload a lid without the "Lunchbox" line a bit later after my print of this completes and then the source files.
UPDATE: After printing the lid, it's obvious the hinge and the lid are a bit flimsy for the task at hand so if you print the files that are up right now, do so at 100% infill for the best strength.
I'll update this with a re-thought snap and hinge shortly.
Print the lid, body and both pins. UPDATE: I recommend printing the whole thing at 100% infill!