Paintball is a sport in which players compete; in teams or individually, to eliminate opponents by tagging them with capsules containing water soluble dye and gelatin shell outside (referred to as paintballs) propelled from a device called a paintball marker (commonly referred to as a paintball gun). Paintballs are composed of a non-toxic, biodegradable, water soluble polymer. The game is regularly played at a sporting level with organized competition involving worldwide leagues, tournaments, professional teams, and players. Paintball technology is also used by military forces, law enforcement, para-military and security organizations to supplement military training, as well as playing a role in riot response, and non-lethal suppression of dangerous suspects.