The Egg Cup

smiffy

Smooth lines and no steep angles means this can be printed without support.
Image shows 3D print using green flexible PLA with the following settings:
8 top solid layers
8 bottom solid layers
4 outline/perimeter shells
15% infill
This seems to have a good combination of strength and pliability.

Dimensions:
Insertable length 80 mm
Insertable width at widest point 36 mm