A paintball comprising: first and second shell portions; a first liquid disposed in said first shell portion until a predetermined first liquid volume is disposed in said first shell portion, said first liquid volume being relatively smaller than a volume of a recess in said first shell portion, thereby providing an exposed inner spherical wall portion of said first shell portion that extends above said first liquid volume to an annular portion of said first shell portion; a viscous second liquid disposed in said second shell portion until a predetermined second liquid volume is disposed in said second shell portion, said second liquid volume being relatively smaller than a volume of a recess in said second shell portion, thereby providing an exposed inner spherical wall portion of said second shell portion that extends above said second liquid volume to an annular portion of said second shell portion, said second liquid including a shear thinning agent that provides a relatively low viscosity second liquid when said second liquid is forcibly disposed in said second shell portion, whereupon, said second liquid changes state at rest to a relatively high viscosity gel that maintains a constant position within said second shell portion, irrespective of the orientation of said second shell portion, to ultimately form an air gap that promotes the joining together of said first and second shell portions; and providing a relatively low viscosity second liquid when said paintball forcibly strikes a target, thereby allowing said second liquid to flow upon and mark the target, said second liquid ultimately returning to said gel state while disposed upon the target; and means for integrally joining said first and second shell portions; characterized it that said second shell portion is inverted and disposed upon said first shell portion such that said viscous second liquid volume and said first liquid volume occupy the same position as before said second shell portion is inverted thereby forming an air gap, whereby said joining means cooperate with said air gap to provide sufficient holding force to prevent said joined first and second shell portions from separating when discharged from a paintball gun. first and second shell portions; a first liquid disposed in said first shell portion until a predetermined first liquid volume is disposed in said first shell portion, said first liquid volume being relatively smaller than a volume of a recess in said first shell portion, thereby providing an exposed inner spherical wall portion of said first shell portion that extends above said first liquid volume to an annular portion of said first shell portion; a viscous second liquid disposed in said second shell portion until a predetermined second liquid volume is disposed in said second shell portion, said second liquid volume being relatively smaller than a volume of a recess in said second shell portion, thereby providing an exposed inner spherical wall portion of said second shell portion that extends above said second liquid volume to an annular portion of said second shell portion, said second liquid including a shear thinning agent that provides a relatively low viscosity second liquid when said second liquid is forcibly disposed in said second shell portion, whereupon, said second liquid changes state at rest to a relatively high viscosity gel that maintains a constant position within said second shell portion, irrespective of the orientation of said second shell portion, to ultimately form an air gap that promotes the joining together of said first and second shell portions; and providing a relatively low viscosity second liquid when said paintball forcibly strikes a target, thereby allowing said second liquid to flow upon and mark the target, said second liquid ultimately returning to said gel state while disposed upon the target; and means for integrally joining said first and second shell portions; characterized it that said second shell portion is inverted and disposed upon said first shell portion such that said viscous second liquid volume and said first liquid volume occupy the same position as before said second shell portion is inverted thereby forming an air gap, whereby said joining means cooperate with said air gap to provide sufficient holding force to prevent said joined first and second shell portions from separating when discharged from a paintball gun.