The antibacterial power of pure silver prevents bacterial growth. Since pure silver powder, specially processed, is kneaded into the resin, the antibacterial power lasts even after washing. It is proudly made in Japan. You can warm it in the microwave by removing the lid. It can also be used as a food container or lunch box. Capacity: Approximately 1.5L Please understand that this is a home-stored item before purchasing. Please see this hashtag for water bottles, lunch boxes, and other items I am selling↓ #ra水筒・弁当用品 Food container, Lunch box #保存容器 #弁当箱