A capsule to seal the opening in a container, such as the neck of a bottle, wherein the container is adapted to contain a first fluid, the capsule being adapted to contain a second fluid that is different from the first fluid, the capsule being movable from a first initial position of the capsule to a second opening position of the capsule making it possible, in the second opening position, to release the second fluid into the container, thus mixing the first fluid and the second fluid, wherein the capsule is adapted to form, in its second opening position, and fixed in the opening in the container, a dispenser for the container which is adapted to dispense the contents of the container to the outside.

A capsule to seal the opening in a container, such as the neck of a bottle, wherein the container is adapted to contain a first fluid, the capsule being adapted to contain a second fluid that is different from the first fluid, the capsule including a striker movable from a first initial position to a second opening position and which, in the second position, allows the second fluid to be released into the container, thus mixing the first fluid and the second fluid, the striker being in the form of a cylinder adapted to allow a fluid discharge device, such as a pipette, to pass through the capsule and to enter the container.

An apparatus and method for selectively adding additional ingredients, e.g., liquids or powders such as caffeine, vitamins, flavorings, supplements, to a liquid beverage in a container, the container includes at least one side portion, a bottom portion attached thereto, and a top portion attached to the at least one side portion, an opening mechanism for selective opening of a lid over an aperture, a first compartment located within the container and in fluid connection with the aperture, and at least one secondary compartment each having a top portion and a bottom portion located on the top portion of the container, wherein the at least one secondary compartment is external and adjacent to the first compartment; wherein pressure on the top portion of the at least one secondary compartment releases an ingredient from the at least one secondary compartment in the first compartment within the container.