Bamboo tube is a natural material with good thermal insulation and air permeability. During use, rice and water are put into the bamboo tube for cooking. Because bamboo itself has a certain antibacterial effect, it should be thoroughly cleaned and dried after each use to ensure hygiene and safety. After each cooking, the residual food or sediment will be removed, and the bacteria will be avoided by drying in the air. This will not only prolong the service life of bamboo tubes, but also ensure that fresh and delicious rice can be obtained next time.