Mushrooms Self Healing Injection Ports: vial rubber stoppers are made of rubber, not easy to deform, durable, washable, reusable, corrosion resistant, and can be applied for seal the vial containing most kind of liquid or solid.Rubber Bottle Stoppers Great for liquid culture, BRF Jars, injection, Supplemented substrate jars, Grain Masters .stoppers can be used to make self-healing injection ports in Mason jar lids or medicine bottles.