I was watching a video of Julius Sumner Miller (Pascal's Principle) and he had a short demo in which he explained that a glass bottle full of water, completely airless, could provide just as much resistance as a solid hammer, but a bubble of air would prevent this. I then did an experiment in which I dropped a brick on a full glass bottle (no air) and then an empty one, both capped and sealed. The empty one broke while the full did not. I understand this works like so because water cannot be compressed, but beyond this I do not quite understand the physics in this or how it relates to Pascal's Principle and pressure specifically. Does anyone know how to explain this? Thanks!