The hollow Polo mint, first produced in 1948, and was an imitation of the popular Life Savers mint, produced in 1912. The Life Savers mint got its name from the then-popular, Life Savers rings that were used on boats. So the design actually came from Life Savers, then, it is to be believed. However, did science or logic have a part to play in the design of this famous mint with a hole?