Example) Design for poor people : Q Drum.

Great inventor Dr. Paul Polak presented that a billion people in the world are expecting for a $2 pair of eyeglasses, a $10 solar lantern and a $100 house.

One of the simplest and yet most elegant designs tackles a job that millions of women and girls spend many hours doing each year - Feiching water, Balancing heavy jerry cans on the head may lead to elegant posture, but it is backbreaking work and sometimes causes cripping injuries. The Q-Drum, a circular jerry can, holds 20 gallons, and it rolls smoothly enough for a child to tow it on a rope.