Travel urns are specially made of a plastic base large enough to hold a temporary urn and is encased by a silk Covering. It comes in your choice of many colors and can be engraved. The military one is navy blue with your choice of emblem of your service. Silk urns are approved for flight by the transportation security administration. This type of urn can be x-rayed as is required while in the airport. This can be used as a permanent urn if you desire.