HEAVY DUTY GLASS - Our 16 oz beer bottles are made with durable, thick amber glass so light can't get inside. Perfect for homebrewing, Kombucha, flavored water, whiskey bottling, soda, cider, kefir, vinegar, oil, vanilla extract, and more. KEEPS CONTENT FRESH - The Flip Cap is easy to use and creates a tight seal, ensuring the content inside stays as fresh and delicious as the day you bottled it. COMPLETELY REUSABLE - Our durable glass beer bottles are built to last, so you and your loved ones can use and reuse them for years. PACKAGED SAFELY to prevent breakage during shipping. EXTRA-STRONG SEAL - The Flip Cap tops are made with sturdy steel and thick rubber gaskets to provide a super strong, leak proof seal, which helps preserve your homemade beverages, carbonation, or fermentation. 100% SATISFACTION GUARANTEE - Ilyapa stands behind all of our glassware 100%. Please reach out to us with any questions or concerns, so we can help!