Makarand writes "Technology that renders optical media useless after a short lifespan will soon find its way into stores in the form of perishable DVDs. Retailers in the Southern United States will soon start giving a sample DVD to buyers of a CD (by Nappy Roots, a hip-hop group). This promotional DVD from Atlantic Records will work for only 8 hours. This promotion is aimed at finding if music fans would be interested in buying a package with both audio and video instead of just plain audio. A special dye sandwiched between the layers of the DVD will interact with air making it opaque and unreadable later. If this media catches on you may not have to return your DVD rentals in the future." We noted this 2.5 years ago.