Depends on the quality of your seal. With a perfect seal, your humidor will try for 100% RH. How often you open the lid will determine how close it gets. This is a new humi right? Are you just trying to season it? If so, a bowl, glass, tupperware of distilled water works pretty well, just make sure everone that might open the box or move the box knows it's there. Once you get it up in the sixties, get the water out and just rely on your oasis or beads.