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China's educational resources are very uneven. Children in many poor areas lack learning materials.
Meanwhile,China consumes a lot of drinks. For example, a brand of instant milk tea sold 1.1 billion cups in 2017. Although milk tea uses coated paper cups, all the lids are made of plastic，which take 500 years to degrade in the natural environment and has an inestimable impact on China's ecological environment.My idea is to make raised letters, numbers and other signs on the lid. Therefore the lid can be used as a teaching aid for poor children or for the blind.The cup lid is no longer rubbish, but help to ease education poverty.