The egg is nothing more than a small, expensive jar stuffed with silica gel absorbent. You won’t be able to put a typical thermally dehumidifier gadget into a small container the size of a shoebox, so it’ll be more useful. If you’re trying to dehumidify a damp basement, rock salt is a natural dehumidifier on either side. It has the capability of absorbing more moisture than any dehumidifier on the market.