Imagine a super-fussy bouncer at an exclusive club. Only the VIPs—tiny water molecules—get through. Everything else? Sand, salt, bacteria, pesticides, and that weird mineral taste? It’s all left outside, sulking.
That’s basically a reverse osmosis filter. It pushes your tap water through a semipermeable membrane (a fancy, microscopic strainer). The holes are so small that only pure H2O can squeeze past. Everything else is flushed away.
Fun fact: “Osmosis” is nature’s way of balancing water. Plants use it to drink. “Reverse” osmosis? That’s us flipping nature the bird and forcing water through a filter with a pump. Pretty cool, right?
