Maurtis
Elio Addict
I wonder if it's possible to enlarge the coolant container slightly and make it a "holding mechanism" instead, whereby you could lift the top and have access to 2 individual compartments - one for wiper fluid and the other engine coolant. This could certainly reduce the overall footprint of having to mount 2 separate fluid holders.
With the added benefit of heating the washer fluid for those who need to de-ice in colder climates. But they would have to take care since windshield washer fluid tends to have a lower boiling point. From looking online, I am seeing between 148 and 180 degrees.