when we empty a can,Mostly we throw it out. Chinese are quit creative, they can make many thing from it.
In supermarket we can buy a lot of food witch is conserved in cans. so it is good that we can recycle them.
In Germany garbage are sort in four categories.
some place when people get married, at their weeding day people tie empty cans on the newly weds car. so it makes a lot of noise when they drive away.
In China some adult can make toys for children out of empty coca cola cans for example in mandarin call "denlong".some make ashtray.
Some children they make a walkie-talkie as the picture shows.
Learn Mandarin Chinese Pronunciation