The tea leaf box is made using the new technique of the potter's wheel by "Japan Yamanaka" called "screw grinding". The piece is double-tiered, so you can store two different kinds of tea leaves. It's also a good idea to put some sweeties with tea leaves inside the box. Other tea leaf boxes have inner lid, however this piece is extremely airtight without a inner lid since it's designed with a screwed lid. * The capacity may vary according to types of tea leaves.