A Biodegradable Urn is designed to naturally break down over time, but how long it lasts depends on the material and environment. In water, a Biodegradable Urn can dissolve within a few minutes to a few hours. When buried in soil, it typically takes a few months to several years to fully decompose. These urns are made from eco-friendly materials like paper, sand, salt, or plant fibers, allowing ashes to return gently to nature.