I am new to surface design,i have already got answer form Mr.Deepak, may be i can get differnt idea form you ,so I have attached the surface file on first discussion, waves design I am going to apply on top and down side of the bottle as a sweep cut, not on middle position,
Use the method described in these videos/post for wave spring:
http://www.youtube.com/watch?v=SFcfj-2Hi_M
https://forum.solidworks.com/message/193405#193405