Material: Stainless steelFunction: The bottle has a breather valve that can discharge carbon dioxide. Features:1. Use it to store food, such as nuts, coffee beans, candy, tea, American ginseng and so on.2. To maintain the original flavor and aroma, a good play moisture, mildew effect, set the food in a dry small environment.3. Corrosion-resistant, non-toxic, no miscellaneous taste, so that the items do not taste each other string.4. Cover the exhaust valve can release carbon dioxide, to prevent the outside air into the dry environment, can effectively extend the shelf life of coffee beans.Caution: Before use, wash with boiling water and wash with detergent and dry.Cover material for the plastic, do not directly open the water or put boiling water inside the boiling, otherwise it will lead to deformation.