Doi Kinzoku Kasei Yutanpo Mini Maru Two brand new, unopened units [Size] Approximately 19.2cm diameter x 6.4cm height [Weight] Approximately 400g [Capacity] Approximately 1.2L Body: Made in Japan A traditional galvanized iron hot water bottle, providing natural warmth that's kind to the body. The stopper can be removed for direct heating over a flame. The flat bottom allows for use with induction cooktops. Features a pressure-regulating stopper. Designed to release internal pressure exceeding a certain level to minimize damage. Reinforcement pillars prevent deformation due to reduced pressure when the water cools. Includes a mini funnel for easy water pouring. The funnel is a soft type that doesn't take up much storage space. The 1.2L capacity is a size that can be filled with a commercially available kettle. Despite its small size, it provides warmth for 6-7 hours in a futon. ● Hot water bottles are economical and offer the appealing warmth of a heating appliance, but incorrect use can lead to serious accidents and injuries. Before use, be sure to read the instruction manual carefully and understand it thoroughly. Also, store the instruction manual carefully so that you can refer to it whenever necessary. ● When heating directly on a stove, heater, or induction cooktop (IH), always remove the stopper. ● Metal hot water bottles cannot be heated in a microwave. There is no product description.