Do you have a source? All the online stores I've found sell the hand sprayers empty.
Follow
this link and click "products". It says: "capacity 250 ml", which is no guarantee of course, but the can next to it which contains 1 liter (and which costs 4x as much as the spray) also says "capacity 1 Liter". I could maybe believe it about the empty sprays, but it makes no sense whatsoever selling empty cans, which is they reason I believe the sprays are also filled.

Ultra Ever Dry is not a transparent coating, so putting it on your windshield may not be the best idea you've ever had.
Ah! VERY good point!
