Customized version of http://www.thingiverse.com/thing:57881

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=57881

Using the following options:

lip_width = 3
include = Inserts
holes_shape = 6
number_of_inserts = 1
growth_of_holes = 0.5
mode = Design
stack = No
hole_spacing = 1
cup_height = 50
cup_thickness = 3
cup_base_width = 80
cup_top_width = 70
width_of_holes = 3
stack_spacing = 1
cup_shape = 60
units = 1
insert_thickness = 4