There are pendrives in the market which are extremely thin, which have only one side of the USB plug, even i have one of those, and honestly speaking they are too fragile and not at all user friendly.
This one in particular, has impressed me alot, the new Sandisk Fit. It is as small as a Quarter (A bit smaller) , it is robust at the same time is extremely fast. They even managed to put a small LED in it. I use one in my car and the other in my Key Chain if i need to transfer data anytime at all.
It is very tough and good to look at and the best part, IT IS CHEAP!!
The 4GB is INR500 ($12) and it gets the job done.
Highly recommended to anyone who wants his data all the time with him or just for the sake of having a small PenDrive!!.