The lid on this keepsake urn is not threaded. In order to seal it permanently, you may use a strong adhesive such as E6000.
Keepsake urns can be used for various reasons. Many people use keepsake urns to share a loved one's ashes among several family members. Others use a keepsake urn to keep a small portion of ashes after the majority of the ashes have been scattered, buried, or placed in a columbarium. Some people choose to scatter or keep a small amount in a different place than where the primary urn is displayed.
This is a small size cremation urn that holds 7 cubic inches of ashes (approximately 1/2 cup).