White Labs liquid beer yeast is one of the industry leaders in fresh liquid homebrew yeast. Their new FlexCell™ and PurePitch® Homebrewer packaging are made to contain over 100 billion cells. Offering you Non GMO free, kosher friendly, fresh liquid yeast, with each PurePitch for a five gallon batch. Each White Labs liquid beer yeast we sell will come with a free ice pack. We will proudly replace any White Labs liquid beer yeast that does not start fermenting in a starter. We highly recommend always doing a yeast starter and have top of the line yeast starter plates available. New to yeast starters? Check out our guide: How to Make a Yeast Starter.