Not sure its understood. I have water texture, consisting of rain drops and streaks.
I can apply this to the cap, the bottle and the label. All of those 3 are individual objects.
What I would prefer is to apply the texture of the group of all 3 objects, so that (especially the streaks) can start at the cap and continue over the bottle or start at the bottle and continue over the label.
oh sorry I thought your droplets were objects (meshes), actually if you prefer you can keep different objects and make the doplets match, if you select both bottle + label and unwrap them together it should work, but perhaps I miss a difficulty, maybe share your file?