Cremated remains may also be incorporated, with urn and cement, into part of an artificial reef, or they can also be mixed into paint and made into a portrait of the deceased. Some individuals use a very small amount of the remains in tattoo ink, for remembrance portraits. Cremated remains can be scattered in national parks in the United States with a special permit. They can also be scattered on private property with the permission of the owner. A portion of the cremated remains may be retained in a specially designed locket known as cremation jewelry, or even blown into special glass keepsakes and glass orbs. The cremated remains may also be entombed. Most cemeteries will grant permission for burial of cremated remains in occupied cemetery plots that have already been purchased or are in use by the families disposing of the cremated remains without any additional charge or oversight.