From the product description, check product page for current description, price and availability:

• This 3-gallon glass carboy is perfect for fermenting beer, wine, cider, mead and more; The premium glass is impermeable to oxygen and protects beverages from contaminants
• Carboy is scratch resistant, so users can scrub it clean without damaging the item; Unlike plastic, glass does not hold or absorb foul, eliminating the inconvenience of frequent cleaning