The design redefines the piggy bank and makes a paper money bag for the image of candy packaging, so that the paper bag has certain functions and expectation. When it is full and tearing open, getting a full coin is like the joy of getting a candy, giving a new psychological feeling to the money-taking behavior. The one-time material makes "carrying" and "taking" a very conflicting behavior. Once the seal is opened, the piggy bank loses its "storage" effect, leaving only a sweet feeling like candy.