Stackable USB drive !

stackable USB drive Stackable USB drive, designed by Vicky Wei, Memory Infinite is a “stackable” USB drive concept that features a “female connector on one end and a male on the other — when more storage is needed you simply attach another Memory Infinite flash drive
Not easy to be used as a promotional product as I can’t see where the logo could be printed. But the idea is funny !

Info from www.techeblog.com