It's a multi purpose air blower and it can be yours for only $5.75 (with free shipping).
I have one in my camera bag and another one in my flash bag and use it for things like blowing of around the lens mount before I change lenses. I use it to blow off dust from either end of a lens and for blowing gunk out of my camera body (just be sure to hold the body with the lens mount facing down).
They have a check valve in the back so it is not sucking the dirt in that you're trying to blow away.
These are from Adorama are made of a nontoxic, environmentally friendly silicon rubber, and are resistant to both high and low temperatures.
It also has a removable nozzle so it can easily fit into your bag.
So head over to Adorama and get yourself a blower (or two).
