 We develop an external catheter cup with a male and a female version that could then collect that urine in a non-invasive manner and then pass it through a membrane filtration system. And the reason that we decided to do a membrane system is because it's forward and reverse osmosis. So the forward osmosis part of it is purely by osmotic pressure, no power required, which is lovely for us. And that's where we get our urine brine. Right.