The problem is the rigidity of the plastic, you really need hard plastic containers so they don't expand. With DWC if you stack the tubs you have to move the top tub to access the reservoir for adding water. I grew some lettuce and a tomato on a styrofoam raft in an plastic recycling bin lined with plastic sheeting and a couple airstones. It worked great for the lettuce but the long seasoned tomato had problems because the root mass was big and I had to remove the raft to tend to the water. Make sure it is easy access to water for ph/IC checks and to add stuff.