Ever wondered how airplane toilets manage to flush without the massive water tanks and plumbing of regular bathrooms? Turns out, it's a clever (and slightly gross) feat of engineering that relies on vacuum suction and lightweight design to keep things functional at 30,000 feet.

Editor’s Note: Most of us don’t think about airplane toilets until we’re awkwardly wedged in that tiny cubicle mid-flight. But understanding how they work—efficiently and with minimal water—gives a fun peek into the hidden innovations that make modern air travel possible. Plus, it’s a great conversation starter for your next delay on the tarmac.