Hello - to make the depression -
- OffsetSrf to say 2 mm
- Trim the bottle and the offset with the shape curve from the side view,
- This is the trick: Extrude the trimmed edge of the bottle inward normal to the surface (Fin command) 3 or 4 units.
- FIlletSrf at say 3 units from the bottle to the fin surface.
- FilletSrf from the first fillet to the offset surface.
This gets you fillets that are larger in radius than the depth of the depression and true rolling ball fillets all the way around - if that is needed,
-Pascal