Hi, in the image below you can see point "3" is the bottle that I created using blender 2.69. "1" is the side view of the original bottle "2" is the front view of the bottle. Now I want this design of the curve on my blender bottle, but I have no guess how to achieve it. I mean how to create those design on the bottle. The curves on bottle are like small gutter which are towards inside of the bottle.
Some technics to do that (I won't make here the exact same bottle...):
The cut is straight, but the result is parabolic due to the bottle shape.
Again a curved shape obtained from a flat curve.
- Create a cutting shape (here a plane)
- Scale/orientate it
- Shift select the bottle and enter edit mode in the bottle (both are selected and that indicates to Blender which shape(s) will cut the bottle)
- Use 'knife project'
- In your situation, make sure that 'cut through' is checked
- In edge selection mode
- Select the wanted edge loops
- Use CtrlB
- Choose bevel depth with Numpad + and Numpad -
Once done, give a shape, for instance selecting the two face loops as below and scale them:
Draw it flat and bend the shape
- Use a mirror to make so the future cutting lines will match
- Add a simple deform modifier to bend the shape to 360°
- Make the cuts/bevels as previously
- Apply the modifiers and remove doubles when the shape is as you want
- Add a subsurface modifier
- Scale and merge (or extrude and model) the shape to fit your bottle
Supplementing the options provided by lemon, here is a different approach. Before any other steps, instead of having the vertical edges parallel to the z axis, twist the bottle so that the edges now vertical become helical around the z axis. Adding the groves around the bottle might then be able to be achieved by standard methods of adding geometry.