I'm just a little curious about what size of tupperware your going to be using that will hold, from the sounds of it, multiple boxes?
Reason being large tupperware (if its like the bigger tubs we use for basement storage etc) usually does not have a very good seal. The smaller/medium sized food style containers do but usually not the large ones. Make sure you got a good seal or your going to fight the humidity constantly.
Not trying to rain on your parade at all. Just a thought to consider! :thumbs: