Abstract: A disposable hood and container assembly for shielding the stopper and top of a test tube during the opening thereof. A container having a cylindrical top has a plastic bag affixed over the top so that the body of the bag extends above the container. The bag has a reinforced opening in the wall through which the stoppered end of a test tube may be inserted. The stopper is then removed by grasping it from outside of the bag and dropping it into the container. Gross blood, serum, other body fluids or any aerosol of blood or body fluids caused by rushing in of air into the evacuated space is captured within the plastic bag. This reduces contamination of the laboratory environment and augments the use of gloves, masks and goggles.