Sorry to be serious about jokes, but I thought I’d share the fun fact that these caps are actually not attached at all, which is probably why it got yeeted (yote?) so cleanly. If the storage tank had a top at a fixed height, vapors would accumulate in the air space above the oil, so these huge tops actually float on top of the fluid and rise and fall with the fluid level. You can tell how full they are just by looking at them from above.

Edit: turns out the lid flip tank actually wasn’t the floating lid design, at least not in its earthly state. I still think they’re neat anyway.