Nuked bread can last up to 60 days, according to the company, MicroZap, which spun off from Texas Tech University. Among wasted foods, bread is a major culprit, meeting its end in the garbage can once it becomes festooned with greenish growths of mold. This usually happens within 10 days of the bread being baked. MicroZap's method kills the mold spores, keeping bread mold-free for two months and helping Americans reduce some of their food waste. Now you could preserve all those loaves of Wonder Bread you hastily grabbed at the supermarket during the Hostessocalpyse!