Great Fermentations Pre-Memorial Day Sale – up to 30% off For a short time, Great Fermentations has a pre-Memorial Day Sale Going on. That sale discounts select merchandise by up to 30%. Pre-Memorial Day Sale at Great Fermentations Check sale or product page for current availability & pricing Also at Great Fermentations: Tapcooler Counter Pressure Bottle Filler! – Hands on Review More: Recent Great Deals