Sterilite Convenient Home 2-Tier Layer Stack Carry Storage Box, Clear (12 Pack)

I bought these the other day to store some important craft item I did not want to get broken. I found them very sturdy and easy to open and lock. ..then just by accident I discovered when buying an other set later on the same day that you can attach the second set on to the first 2 level set you bought ...making a stacking tower of 4 levels. ..you just keep adding sets to the desired height you want. Mind you..you will still have to use common sense when stacking and locking these together, the total weight of the items together. Being taller now it will weigh more putting a bit more strain on the locks and handle trying to lift the whole works by the top handle/ After all they are still only plastic...not metal. I still find then very strong and sturdy..well worth their cost they are not expensive at all. For me? I find them awesome.

Loved it. Used with daily meds, things associated with. Sort yet keep close/separate/together. Great as first aid kit in 3 levels. Bought 3 units and too thrilled with the functional usage.