Wood box for Chinese gabbages

So this is one work related thing making 100-200 of these wood boxes to Chinese Cabbages. We use these for storage in the winter. We had about 1500 of these and that 100-200 have to be made new every year because old going to rotten. And this is most cheap way to do it. Maybe some foldable composite box would be better but havent find any such a big and should be able to have 5 top of each other.