This 3 gallon glass carboy is a small glass carboy that is perfect for use in making port wine kits, which are often formulated to yield 3 gallons total. Using a 3 gallon glass carboy ensures that wine can mature, age and clear with minimal headspace, ensuring as little oxidation as possible. These carboys are also wonderful for doing split batches of beer or wine. Many brewers will brew a 5 or 6 gallon batch of beer, then split it for experimentation that includes oaking, different yeast strains, different dry hops, or varied bacteria strains. Whatever you choose to do, a 3 gallon carboy will help you achieve the results you are looking for!