A stress ball is designed to be malleable to allow pressure exertion when the ball is pressed between the fingers. Using the ball offers the hand movement therefore, stimulating and contracting the muscles which eventually strengthens the hand. However, as the name suggests, a stress ball ostensibly helps relieve stress.

A custom stress ball comes in various colors and shapes. Most of the balls are made of a flexible, soft plastics. Molding material is molded by creating the mold into the required shape. The molds are then sprayed with silicon lubricant and coated with the intended color before being baked in an oven. The preferred ball material is poured into the molds and put in an oven to cure. Once done, the balls are removed and painted. Then the customized logo or message is printed on. Customized stress balls can be good advertising or promoting items.