The WAMP has been pre-sold on the Japanese crowdfunding site Makuake since September 3, 2021, and is gaining popularity with sales of over 6 million yen. The WAMP is a unique product that uses the exhaust heat from an oil lantern to cook and keep food warm. It is thought to have become popular in Japan because oil lanterns are popular as fashionable camping gear and there is a need to keep food warm when camping in winter.