Julia,
I just saw your link to this on Pinterest and it is GENIUS!! Some of you may have seen this already, but it's a link to Julia's main website showing how she uses The Container Store's Cupcake Caddies to transport cookies.
AWESOME idea!! I have actually been searching for an alternative to carrying cookies on sheets to a wedding that I am doing next week (this is a very rainy month in Florida).
In case anyone else needs this solution, check it out: