They can be used to store other items such as nuts, oils. Our aluminum tea jars block light, which is especially damaging to organic materials, keeping your goods fresher for longer. Unlike some other aluminum jars, our tea cans are to make them smell proof, odor free, airtight, and waterproof. Our tea stash tins are constructed with high quality aluminum, and are a perfect solution to storing and preserving your favorite tea. The tea stash jars is discrete, simple to use, and portable, it is durable, airtight,storage containers.