We use mini tin lunchboxes. You can find them at ross in the candy/gift section. They most always come with some kind of packaged cookie. But i get them for about $1.99 and i just toss those cookies. The tin boxes are perfect and the girls love their little elmo boxes. The girls also have a nicer, large tin box that i actually got in the airport but they sell them all over. They are made by the original tin box company. The have really cute beaded handles. I line the tin boxes with wax paper to make clean up easy and i figure the less washing of tin the better.
Sigg also makes snack boxes but they are $$$ and hard for a child to open.
http://store.yahoo.com/tinboxco/

Sigg also makes snack boxes but they are $$$ and hard for a child to open.
http://store.yahoo.com/tinboxco/