Sealing It Up
The first step after purchasing his container was making sure to seal it shut. Instead of using the giant double doors, Wayne instead made sure to seal them shut and instead installed a swinging door on the other side.
He didn’t just seal those doors though — he made sure nothing could get in or out, especially leaks. The other important thing he did was made sure that the door he installed swing inward, not outward. He now had a one-way entry point to his container. Trust me — this will make a ton of sense once you see what he did next!