We had 2 weeks Add this Brotbox use. The bread was moldy and not stayed five days fresh. After these 14 days, we found that the cap had completely arched. Now he was only a little to the center and the lunch box was therefore not "closed" above the margin. Consequently, the bread was dried up very quickly. We have never used this board made of bamboo and not yet washed moist. The bread was also not warm down in the breadbox. We assume that the board has absorbed moisture from the bread and has then deformed. If the lid still lie flat, we would retain the breadbox. So he went back.