Used about 5 times for winter camping. There are burn marks on the bottom of the main body (please check the photos). Authentic hot water bottle (with a fluffy cover) made by "Maruka," a specialist hot water bottle manufacturer. Can be heated directly over an open flame or a wood-burning stove! Experience the quality of a Japanese-made hot water bottle. Great for home use, camping, and outdoor activities! 【Always remove the stopper when heating.】 【When closing the stopper, use gloves, etc., to close it.】 【Please be careful of low-temperature burns when using.】 Body size: Approximately W29.5 x D21.6 x H7.4cm Capacity: 2.5L Material: [Body] Hot-dip galvanized steel sheet [Stopper] Brass [Packing] Synthetic rubber Made in Japan (The cover is made in China)