The design of this equipment comes from the beer barrels. Joseph Pilates, the creator of Pilates Sport, was beer drinker and his house always was full of empty beer barrels. Once he decided to use the empty beer barrels to make a pilates equipment.
In fact, result was successful. Therefore, J. Pilates started to use this new equipment for the pilates lessons. Thus, a new equipment came to pilates sport and became popular among the pilates fans very soon. It is especially popular in the group pilates classes.