The Bamboo Lozenge USB drives are an excellent eco friendy alternative to the standard USB drives. Bamboo is a fast growing woody plant. All of the bamboo that we use for our usb drives is sourced from managed forests, so they do not have a neagtaive effect on the environment. The bamboo USB drives are available in a range of memory sizes including 128MB, 256MB, 512MB, 1GB, 2GB, 4GB and now a huge 8GB. These lozenge shape bamboo drives are a fabulous green promotional item!