Disposable plastic syringe for filling liquids or to pressure fill small moldings. To fill syringe, pull out plunger and fill or suck up liquid if viscosity permits. Placing syringe upright remove any entrapped air and inject into silicon rubber or plaster mold. In mold preparation, provide air vents in undercut areas to release entrapped air for bubbles free casting. When all air vents extrudes excess fillings it denotes mold is completely filled. As a disposable syringe cross usage of different casting materials is best avoided as might affect cast setting.