Wire coat hanger?
Bend it into shape, kinda.. doh. Difficult to explain :S
Heres a quick sketch of what i mean
You could prolly do it without the 2 side supports though.
Big circle on bottom to keep it steady, smaller circle on top to keep the bottle steady and an ellipse for the spout to go through. You may be able to do this in one piece if you plan it right. No cuts, no joins
Good thing is it should more or less last forever