How do you keep mold out of bread box?

Keep your breads inside airtight bags and squeeze as much oxygen as possible out of the bags before closing them. Reducing exposure to oxygen will help prevent mold on the bread, and the airtight bags will keep any mold that does appear on the bread from spreading into your bread box.

Does a bread box keep bread fresh longer?

But, unlike the bag, a box also is breathable, allowing some of that moisture to escape instead of softening the bread's exterior. In short, the box creates the perfect humid environment to keep your bread at its peak for three or four days.