Can centrifuge tubes be sterilized in an empty beaker?

Sure. Sterilization of centrifuge tubes requires opening the centrifuge tube and placing it in a sterilized container, beaker or sterilized plastic bottle, sealing it with newspaper or kraft paper, and high-pressure sterilization. Centrifugal tube is a common experimental consumable in laboratories, used to rotate standard samples to separate solids from liquid chemical solutions.