Originally Posted by
i_am_jim
The rear rack and trunk bag that sounded good at first doesn't look promising after searching racks. In general the flat part seems to only be about 12-13 inches, and trunk bags are made to fit on this area.
15". I was thinking you'd have to have it at an angle with the top of the bottle sticking out the end anyway. Maybe shape the bottom with a towel to support the bottle.