The Passages Collection of Cornstarch Urns is made from durable and environmentally-friendly cornstarch. They feature a secure “snap lock” closing mechanism that permanently closes the urn. The Urns can be kept at home, or placed in a cemetery niche or columbarium, since they will not biodegrade or deteriorate unless buried. When buried in earth, the urn will biodegrade completely over time. (The time taken to biodegrade will vary depending on local soil conditions).