HOW DOES IT WORK ? The concept is really simple and clever. The capsule has two concentric cylindrical chambers, one inside the other, which are completely isolated from each other. By pressing down on the center of the capsule, it snaps the bottom cover, allowing the liquid to flow from the outer to inner chamber. The compressed tissue which is held in the inner chamber absorbs the liquid and begins to expand. The vertical expansion of the tissue allows it come out from the capsule to be removed.