A reusable dispensing device for dispensing contents into a container. The device including a body having a chamber configured to receive a capsule and configured to sit on an opening of the container. A portion of the body being movable between an unsealed first position and an engaged second position. Piercing means are configured to pierce the capsule, and sealing means are configured to seal the container in the engaged second position. Movement of the body from the unsealed first position to the engaged second position to seal the container engages the piercing means to pierce the capsule and dispense contents from the capsule into the container.