One-Way Exhaust Valve：Keep your coffee beans fresh longer with our innovative one-way exhaust valve that automatically releases CO₂ during the extraction process while preventing outside air from entering, preserving flavor and aroma Convenient to Use:This single dose coffee bean cellar set includes 8 tubes, each capable of holding 20-26g of coffee beans. Prepare your daily doses in advance for quick and hassle-free brewing every morning Not just for coffee:These versatile sealing tubes can also store tea, spices, and more. With 8 tubes, you can easily organize your countertop and streamline your kitchen storage Smoother pouring of coffee beans:The glass tube uses a walnut stopper, which allows for smoother pouring of coffee beans compared to screw on bottle stoppers, making your espresso making process more elegant High-Quality Materials:Crafted from premium thick borosilicate glass, each tube is designed to hold up to 26 grams of coffee beans while ensuring durability Elevate your coffee brewing experience with the Coffee Bean Cellar Tubes Single Dose set. Designed for avid coffee lovers, this innovative storage solution features 8 high-quality tubes that keep your beans fresh and flavorful. Each tube, made from thick borosilicate glass, is equipped with a oneElevate your coffee brewing experience with the Coffee Bean Cellar Tubes Single Dose set. Designed for avid coffee lovers, this innovative storage solution features 8 high-quality tubes that keep your beans fresh and flavorful. Each tube, made from thick borosilicate glass, is equipped with a one-way exhaust valve, ensuring optimal freshness while simplifying your morning routine. Perfect for storing not just coffee beans but also tea and spices, this multi-use storage system will help you stay organized and ready to brew the perfect cup every time.-way exhaust valve, ensuring optimal freshness while simplifying your morning routine. Perfect for storing not just coffee beans but also tea and spices, this multi-use storage system will help you stay organized and ready to brew the perfect cup every time.