Will sunlight warm liquids?
I would think that this would depend on several factors. First off - what kind of liquid? It stands to reason that sunlight would warm any liquid to some degree, but a darker liquid would absorb more of the sunlight and thus heat to a greater degree. Also - what kind of container is the liquid contained in? Again, the darker the container, the more sunlight is absorbed by the container, and the more heat is transferred to the liquid contained therein.