If you have a thing for the classic Sci-Fi references, these handmade raygunz would be great to have sitting on your desk. Granted they probably won't hurt anyone, that is unless you throw it at their head, but they're still cool.
I would like to point out that I resisted the urge to call them pretty and called them cool instead. However, you have to admit the colored glass is aesthetically appealing.
These are made by Jeff Burnette, who has 30 years experience at blowing glass. He doesn't have any prices listed, but like most sites of that type, you can usually contact for more information.