Most Guard Your ID stamps and rollers are refillable, with the only exception being the Advanced Roller. Advanced Rollers contain specially designed ink to work on most glossy surfaces. In order to ensure consistent, high-quality performance, this roller needs to be filled during manufacturing with the ink sealed inside. Because the tightly sealed unit cannot be refilled, once the ink is exhausted, you simply recycle or dispose of the roller and purchase another. For more information, visit refills.