In cold regions such as Manchuria and the Aleutian Islands, the contents of water bottles would freeze, making it inconvenient to drink water. This kind of cover was used to solve such problems.
International Buyers - Please Note. Thank you for your understanding. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\Japan\Other Japanese WWII Orig Items". The seller is "no_spe-94" and is located in this country: JP.This item can be shipped worldwide.