8-Ball Stress Ball with Mini Billiard Rack Stand Squeezable rubber 8-Ball. Comes with its own mini-billiard rack stand. Good exercise. Reduces stress. GEL-FILLED ADULT TOY. KEEP AWAY FROM CHILDREN. Contains an inert, non-toxic, gel. This "Stress ball" is meant for squeezing with the HANDS ONLY. Extra pressure applied by any other by any other means may cause leakage of gel. Easily cleaned with soap and water.