I am trying to replicate the attached image, but I am stuck on the twisted pattern on the surface of the bottle. I have tried a displacement modifier with a texture with no luck. Maybe I am just doing it wrong. Or is it best to make this a part of the geometry? Keep in mind that I want to fill the bottle with some water later, so the geometry should preferably not make this impossible to get right.
What would be a good way to go about this?