Everyone is entitled to an opinion. I was addressing use of a solar still as a primary means to procure water in the desert. I've built enough solar stills in the desert to determine to my satisfaction that they don't work and are not practical under real survival circumstances. The only times they have worked, water was otherwise available quicker using less resources. I won't be using or recommending a solar still in the desert as a means to procure water. The proof is in the photo. Other uses of a solar still may be viable, but that's not the issue. Lug that 6x6 square of clear plastic anywhere you want to, just don't look for one in my survival gear.