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With the continuous development of human society, white pollution is also increasing. So I consider using plastic bottles for cyclic utilization. Then designed the Lattice Cap. The texture above the bottle cap is enclosure of a shape . The cover is made of a permeable material. After drinking, fill the bottle with ink. Then turn the bottle upside down, and you can stamp the lattice to practice writing. It can satisfy Asian, Chinese, Japanese, Korean, etc. practicing writing. The size of the cap matches the mouth of most plastic bottles and is very easy to use. Lattice Cap can reduce the white pollution, and is also stationery.