Vacuum Sealing Technology: Uses a manual press-button mechanism to exhaust air and moisture, creating an airtight environment that prevents oxidation and extends the life of your coffee.One-Way CO2 Valve: Includes a built-in valve that allows coffee beans to "breathe" by releasing harmful carbon dioxide gas while preventing oxygen from entering.Freshness Date Tracker: The lid features a rotating digital dial to record the storage or roasting date, helping you track the beans' peak flavor window.High-Quality Materials: Made from thickened high borosilicate glass, which is durable, non-toxic, heat-resistant, and won't absorb odors.