14/03/2012 Someone left a cup in my basket.
15/03/2012 I added a red plastic bag to attract more cups but got nothing at the end of the day.
16/03/2012 I changed into a professional looking blue plastic bag but got nothing at the end of the day.
17/03/2012 I persuaded people by words, but still got nothing.
29/03/2012 I went back to blue-bag-only solution, and the bag was taken away by someone!
30/03/2012 Someone left a cup in my basket again! I learned that people enjoy throwing trash in semi-right place—a container never says it contains trash.