Abstract: A universal container closure capable of sealing containers with various opening sizes and configurations. The universal container closure includes a solid body with a first opening in the exterior surface that opens into a first cylindrical cavity. A second cylindrical cavity is fluidly connected and coaxial with the first cylindrical cavity. The second cylindrical cavity has a smaller diameter than the first cylindrical cavity. A second opening is also provided in the solid body which opens into a third cylindrical cavity. The third cylindrical cavity has a diameter that is larger than the diameter of the second cylindrical cavity but smaller than the diameter of the first cylindrical cavity.