Plastics are a wonderful material that can provide a safe, lightweight alternative to glass! These 6 gallon plastic carboys are made of high quality P.E.T. plastic that is food safe and great for fermentation! They are BPA-free, virtually impermeable to oxygen, and because of the wider mouth design, are easy to clean without the use of brushes! Their surfaces are non-absorbing, non-pourous and hydrophobic, which means smells and flavors will not carry over from batch to batch if cleaned properly. They are made by The Vintage Shop, a quality name in home brew supplies. Use these for beer, wine, cider, mead...just about any fermented beverage you can think of! These take a #10 stopper or a universal Better Bottle stopper.