This tutorial shows you how to model a bottle in Blender

 

3°) Improve the bottle

 

Add any loop  ( ctrl R ) with the wheel of your mouse, you can add several at once

( look at the pictures below)

 

 

 

 

In MODE OBJET apply the modifier

 

 

Go face mode, select any face in the middle of the bottle and press E to extrude the face

 

 reduced the surface ( S ) and down slightly to the inside

 

  Tutorial following : Make a bottle (4) make a template