A self-heating sake tank appeared in Japan. There is a mezzanine in the lower 1/5 of the canister, containing a quick pack of water in the quicklime and sealed plastic film. Before drinking, as long as you use an “appropriate†plastic stick to insert it from the lower hole, the water will immediately mix with the quicklime and produce a lot of heat. In just 3 minutes, you can put a can of sake. Heat to 58°C.