How long would food last in a bento box?

Question

I know it wouldn't probably last one day out. But I mean during the day.

Answer 1

i say 10-12 hours

Answer 2

I would say about 8-10 hours just to play it safe. It really depends on the type of food you are storing in the bento box.  

Answer 3

Remember that the usual bento boxes are just simple containers, they don't keep food warm or hot so I think food will last max 11 hours. It also depends by the food you put inside and where you kept the box (of course in the refrigerator food will last longer).