Bests & Worsts Reviews from Amazon

This product was not as advertised. I was excited to be receiving my new package of nothing, and at first, I thought that's exactly what I had. A cursory examination of the package would certainly lead one to believe that nothing is inside. I intended to use the nothing therein for a physics experiment my lab is running, wherein it is necessary for us to utilize a region of quantum vacuum. This is a notoriously difficult thing to fabricate - even a "perfect" vacuum contains some residual gamma rays and virtual particles of both positive AND negative mass. What we needed was nothing, and for the price, we really couldn't beat this product. However, closer examination revealed that the package doesn't contain nothing at all - it contains something! Lots of things, in fact! Particulate matter from the packaging process, with some particles in excess of 200nm radius, and only a PARTIAL vacuum, barely 600 torr negative gauge pressure! Furthermore, the clear plastic container practically ensures that the "nothing" will be contaminated by all manner of high energy photons. We were also disappointed to find that no measures had been taken to protect the nothing from incoming solar neutrinos or cosmic rays, and there were no matter interferometers in place to even ATTEMPT to dampen gravitational wave propagation through the package. However, we did find the tantalum-clad heavy-gauge aluminum-zinc Faraday cage to be quite sufficient for blocking EM. In short, this was useless for our purposes! Be warned, this is not a laboratory-grade nothing!