Originally Posted by estratton
Think that size, but more of a cylindrical shape, and a screw top, but with a carabiner welded to the side.
Where are you attaching the carabiner? I mean, I don't see the advantage of having it on the outside of your bag, as you won't be pouring coffee while riding in traffic. Having it securly attached to your bike is about as easy as it gets. No freak spillage on your goodies inside the bag, and no flopping around on the back.