Speckle cup / cup

This is a cup for a party or for an circumstance that needs a lot of one-off cups. The feature of this cup is that it is easy to distinguish by users. Users can make some distinctive signs on their own cups before using it. Then they can find their own cup easyily whenever they need them. After pushing the spot onto the other side, the color turns white, for the reason that the plastic is damaged by force. The change of color let users find their cup easier at a distance