Try it yourself. That method won't even produce enough for a small animal in a day.

However it is not difficult to build a box, slap a sheet of glass on top set at an angle, so the water drips to one side, place a small canal made of stainless steel to catch the distilled water that falls off the glass, and direct that water to a bottle.

With some basic materials I can build a fully functional and practical solar distiller in a day's time and with little money, but with enough capacity to serve several people's drinking needs.

Don't wait till you really need this technology to start experimenting. Better to start today.