Tradeshow Giveaways

Hi all. I have been approached by a IT company to come up with some ideas for tradeshow giveaways for an local I.T. convention. I am looking for a trinket that has that cool factor in the $5, $10, and $20 range. It must have the ability to either engrave or screen a company logo on it. What have you seen that had that "wow" factor?

Thanks.

A bottle opener is always a good choice.
Then there are these squeeze balls. I loke those, regular balloon filled with sand or flour. Really cheap and logo can be applied.
If you want to spent that much i would go for something useful, a tiny, high throughput write speed usb thumbdrive with at least 8gb
or something to stare at like those magnetic levitating things. A base with magnets where you can put a pen to make it float above the base.
A regular unicolour t-shirt with a small company logo (maybe some artistic/futuristic version) is also good. Something that you don't throw away on the way out leaving ;)
Good luck
Report back what it turned out to be in the end.


edit: for that budget you can almost realize all mentioned above at once lol :) And throw your goodies in the crowd :-P