British multi-function urgent need to use the money key ring CASHSTASH + key ring emergency cash box. CashStash has a unique patented cash clip that allows users to place spare banknotes in case they need it. It can store emergency life-saving pills to protect your life. The most important thing is waterproof. The inner ring of the storage tank is specially designed with O-type waterproof gasket. Even if it is in contact with water, it can protect the stored items or banknotes from the risk of getting wet. It is a must-have for you to go out for sports and travel.