This is a BeanSafe Coffee Storage Container designed to preserve the freshness of coffee beans or ground coffee. They are equipped with a pressure-release valve to vent CO2 ad keep out air, moisture, heat, and light, all of which degrade coffee quality. They are constructed from food-grade 304 stainless steel with a BPA-free polypropylene lid. They hold up to 16 ounces of coffee beans. These containers help maintain the flavor and aroma of coffee for an extended period with whole beans lasting up to a year unopened and ground coffee best consumed within three weeks of opening. It is recommended to store the container in a dark, dry place away from sunlight and heat. From an estate sale and while they do show some wear from being preowned, they are otherwise in excellent preowned condition. There are four available.