Thank you for viewing. This is a set of two metal hot water bottles. They are new and unopened. With a compact size of 600ml, they are perfect for use in futons, and also a good size for keeping animals like cats warm. I think they will be useful for saving energy and as a preparation for emergencies. If you have any questions, please ask in the comments. HWB hot water bottle 600, made in Japan, high safety PET material. - Brand: HWB - Model: 600 - Country of Manufacture: Japan - Material: PET - Usage: Hot water bottle Thank you for viewing.