Clay paper

       Clay belongs to a honeycomb-like packaging structure, which possesses a bidirectional function of absorbing and releasing moisture. The absorption and storage mechanism is similar to a camel's hump. The reason camels can survive and traverse deserts where most life struggles to exist, earning them the title "ships of the desert," is largely due to the crucial role played by their humps in storing water. When a camel's body lacks moisture, the water stored in its hump provides essential replenishment.