The Basic Urn Vault Double - Gray is designed to hold two cremation urns (or a larger size cremation urn that won't fit in the single size) that are intended for ground burial. Any type of urns can be placed in the Basic Urn Vault Double including wood urns, metal urns, ceramic urns, etc. If desired, other small mementos can be included in this container. A water-tight adhesive is provided to seal the urns within the vault. .