DURABLE CONSTRUCTION: Flip-top bottles are made from thick and durable glass for optimum resistance to impact and temperature changes. Whitecap is made from premium quality polypropylene and wire cap is made from stainless steel for excellent corrosion resistance. | LEAKPROOF & AIR TIGHT CAP: The resealable cap makes sure the contents inside stay fresh as the day you stored it. Leak proof lid of brewing bottles creates an airtight barrier which keeps the beverages sealed and stops carbonation and fermentation. | WIDE USES: Glass bottle with stopper can be used to store everything from juices, vinegar, beverages and water to oils, kefir, kombucha, beer, milk, syrups and much more. With the size of 1 liter, you will have plenty to serve at the next party. | ENVIRONMENT FRIENDLY: Swing top bottles make them a sound option than plastic bottles. By using these reusable glass bottles, you can cut down the use of plastic in your house. | "MONEY BACK GUARANTEE: Your satisfaction is our primary concern. If you are in any way unsatisfied with our flip top bottles, feel free to contact us. We will immediately offer a replacement or refund, no questions asked. Just click on the “Add to Cart” button and enjoy a risk-free purchase. "