Notes"The implication for the home brewer is cleaner beer, and the application is the glass carboy. Most homebrewers start off with a kit which contains a food grade plastic fermenter. It will serve as a reliable primary vessel for several brews but note: it does have a limited life. The reason big commercial brewers don't line their tanks with less expensive plastic also applies to you. Over several cleanings the plastic acquires small scratches. Although nearly invisible to the naked eye these will act as the breeding ground for all types of beer infections. Even microscopic sized scratches are potential beer ruining trouble spots. Glass surfaces are smoother and more durable and should lead you to switch eventually to glass carboys as both your primary and secondary."Unfurl