Last year (1st clutch) I used a 6qt Sterilite tub. The lids are loose, at best and I had humidity issues on day 2. I used the substrateless method with about 1.5" of vermiculite soaked and a light diffuser. I ended up having to press n' seal them to keep the humidity in. Had 100% hatch.

This year I've found some sterilite locking tubs. They are significantly smaller than the 6qts, but the lids are much tighter. I used more like 2.5" of vermiculite soaked and 2 layers of light diffuser. Haven't had the eggs in the 'bator long enough to evaluate, but during my test runs I had condensation buildup on the sides of the tubs...which I never had during testing last year.