Think about your own garbage disposal or your kitchen trash can. You put stuff in, it disappears, and you don’t think about it until it’s full. A plane’s waste system is exactly the same, just fancier, louder, and thirty-thousand feet in the air.
So next time you flush at 35,000 feet, give a little nod to the vacuum, the blue goo, and the honey truck crew. They’ve got your back, and your… well, you know. Now you can relax, enjoy your pretzels, and never wonder again.