The solder fume extractor is a bit of a DIY classic, so it's no surprise that Adafruit's put together an updated guide that uses some modern components alongside a cleverly designed 3D printed case. The core of this project uses a USB charger, Lithium Polymer battery and, of course, a 3D printed case. It's a pretty useful little project that will help ensure you're not breathing in all those fumes while you're soldering. It's a pretty slick looking case all around, so head over to Adafruit for the guide to make it for yourself.
USB Rechargeable Mini Solder Fume Extractor [Adafruit]