We think we are selling the Worlds Best Jars (Amazon customers agree) and you happen to be looking at one of our best sellers. What makes Infinity Jars so great? Starting with what you see our aesthetically-stunning high-quality heavy-duty black glass exterior shimmers ultraviolet when held up to light and is topped by a BPA free plastic screw top lid. The biggest factor for the popularity of our 1 L glass water bottles is its performance and versatility. Airtight and leak proof? Check takes just a quick twist of the wrist. Smell proof? Check confirmed by a myriad of commentors it will preserve aroma. Light proof? Yes this is what really sets us apart. All Infinity Jars glass is designed in a lab (after years of rigorous research) with the specific intent to prevent light from degrading whatever is inside. Our ultraviolet glass not only looks sleek and sexy it protects organic matter better than anything else on the market by refracting all visible light rays while permitting beneficial non-visible UVA (black light) and infrared light to pass. Thats a sciency way of saying the glass is optimized to utilize the power of light for good. This style provides the ultimate storage for 1 L of anything: water beverages tinctures teas and almost anything else for a kitchen or bathroom. If youre a DIY-type or know one this is the ultimate storage weapon protecting precious contents more