B&H has the Impact 5-in-1 Collapsible Circular Reflector Disc (32″) for only $18.95. Save $20 from the regular price of $38.
The reflector is built around a translucent disc that can be use as a diffuser. The surfaces are available on two removable, reversible sleeves that slip over the disc — silver, gold, white, and black. It can fold down to approximately one third of its open size. It comes with a carry/storage case.
Might not be the most exciting piece of equipment, but it sure is a useful one. This style is nice due to the different setups it can do, all in one convenient package. Can take some practice learning how to fold it back up though! I know there are some good YouTube videos that will show you how.