It's a membrane (I think of it like a sheet of material with tiny holes in it) that only molecules the size of water and smaller passthrough. Most bottled water is made "pure" by reverse osmosis. Those big water filling machines at grocery stores are also reverse osmosis machines.
It's a membrane (I think of it like a sheet of material with tiny holes in it) that only molecules the size of water and smaller passthrough. Most bottled water is made "pure" by reverse osmosis. Those big water filling machines at grocery stores are also reverse osmosis machines.