Stress Balls (as well as many other shapes) are one of the most inexpensive
promotional items that can be used for mass marketing. These products will last for long periods of times and therefore are great value from a promotional and marketing point of view.
Specific shapes can further enhance the message and artwork and make it more meaningful.
With an enormous variety of shapes and colours there is bound to be a stress shape that suits your artwork but if you are of the creative type why not design your own. Although a higher minimum is required it is still great value when you consider that it will be unique and your logo and company will not share the same product with another company in the market place.