Food Grade Poly 8 Gallon Primary Fermenting Bucket for wine or beer with Volume Markings. Volume markings are an extremely useful feature, whether to assist in calculating how many bottles you need when it is time to bottle your wine or how many and what size carboys you need after pressing your grapes. The perfect size for fermenting those 6 gallon batches, much easier for mixing in your chemicals and additives without sloshing over the sides than a smaller fermenter or bucket. For Wine Making and Homebrew.