This Vintage Shop 5 Gallon PET Carboy is a heavy, PET plastic carboy ideal for secondary fermentations of wine or beer. The material is completely taste and odor free, stain resistant, and impermeable to oxygen. Smooth inner walls prevent sediment from collecting and make for easy cleaning. The mouth fits a No. 10 rubber stopper. WARNING: Do not fill or clean with liquid hotter than 127 degrees Fahrenheit (53 degrees Celsius).