On our recent trip to Asia we found these 'shuttlecocks' in Vietnam, where they are used to play a version of Hacky Sack. We saw people using them playing in the streets, but also discovered that there is an official game played with them. The game is called "da cau" and means "kick shuttlecock". The game is similar to Badminton, played on a rectangular court divided by a net, and is in fact the national sport of Vietnam!
The game is believed to have originated in Vietnam in the 5th century BC, when it was used as a military training exercise.
We saw many people playing this game in the streets in Hanoi - like this: