This is a discontinued HAKOYA Tatsumiya series case for sandwiches, onigiri, and other items with a Japanese pattern. The official name seems to be "Basket Hors d'oeuvre." It's foldable and becomes compact after you've finished eating, making it convenient to carry home. The sides have a woven rattan pattern, and there are gaps near the bottom for ventilation. ☆ 15cm x 15cm ☆ Height: 7cm ☆ Height when folded: 1.5cm ☆ Comes with a rubber belt