This might belong in the "pooratech" thread, but here it is:
It's a camera bag, shoulder strap holding the front. It's not big, but for me it's the perfect size: It doesn't get in my way when I stand up (that I tend to do 50% of the time), it doesn't block the ignition, and it can hold pretty much everything I need for a daytrip. The pocket at the back can be removed so I keep the valuables there, that way I can leave the tankbag on the bike if I just bring the pocket. If someone would cut the straps they would just earn half a camera bag, and I would giggle all the way to the store where I buy me another.
Cost: 18�
(and yep we still have winter here..)