Floating lanterns, also known as sky lanterns, are designed to disintegrate over time. However, the rate at which they disintegrate largely depends on the materials used in their construction. The majority of floating lanterns are made from rice paper, bamboo, or other biodegradable materials, which are meant to decompose naturally. However, this process could take several weeks or even months, depending on environmental conditions. It's important to note that while the paper and bamboo components may disintegrate, the wire or metal parts used in some lanterns may not and could potentially pose a risk to wildlife. Therefore, it is recommended to use 100% biodegradable lanterns for the least environmental impact.