"Candy Bar" 3DS/DS game cases by Hori. These hold six games each, and allow you to pop each one out individually. Also I guess they’re the approximate shape of a candy bar. I hope they’re not otherwise meant to look like candy bars. If there’s a blue candy bar out there, I don’t want to know about it.
These will be out in Japan next month, for ¥880 (about $11) each.