Customized version of http://www.thingiverse.com/thing:734598

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=734598

Using the following options:

x_width = 80
generate_lid = 1
lip_overlap_height = 3
looseness_offset = 0.25
radius = 10
y_width = 80
generate_box = 1
thickness = 2
bottom_height = 40
lid_height = 10
lip_thickness = 0.8
lip_height = 8