The jewel cases that are commonly used to ship memory cards are not recyclable. Most people simply throw them in the trash, where they end up in landfills or potentially in the oceans, and they sit there forever. For our customers who use the jewel cases to store their memory cards in their camera bags, we are providing a free card case holder to anyone who desires it – they simply pay for shipping and handling to take advantage of the offer. This case is designed to hold multiple memory cards.