The lid_ is equipped with a date recording ring to record the date of canning or roasting of coffee beans and powder, so that the freshness of the coffee beans can be clearly understood at all times After roasting, the coffee beans continuously release carbon dioxide. The cover has a one-way exhaust valve. Once the cover is closed, due to the pressure difference between the inside and the outside, the valve one-way exhaust will automatically discharge and isolate oxygen and water vapor outside the tank. Food grade 304 stainless steel, anti-corrosion, acid-resistant and anti-rust, lock + silicone ring for a solid seal Matching 304 spoon with silicone anti-scald to prevent the spoon from overheating and burning hands Portable and small space, convenient storage, no problem Sealed coffee bean tank Sealed exhaust valve Sealed storage tank with spoon, dried fruit storage tank, coffee tank Airtight Kitchen Container: The sealing lid is equipped with a silicone sealing ring, which can be used as a gasket to keep the contents fresh. It can be used as loose tea container, coffee bean container, coffee powder container, nut storage container, candy and cookie jar, etc. It can keep your dry food cool due to its good airtightness. It can also be used as a coffee bean container, container loose tea, nut container or jar of candy Specification: Product name: Hermetic stainless steel tank Net weight: large 451g, medium: 393g, small: 371g Product capacity: 1800ml, medium: 1500ml, small: 1200ml Material: 304 stainless steel. Package: 1 * airtight stainless steel tank