Use to drain the leftover shampoo from nearly empty "Tresemme" bottles

Place small end in new bottle and upturn the old bottle on top to drain.

Wanhao D5S

.2mm

full

Made this model in Tinkercad,

then found
http://www.thingiverse.com/apps/customizer/run?thing_id=49597&code=df8a8922d27450a25e0fccac02c3ce80

settings would be
large end diameter 30
small end diameter 21
wall thickness 1
funnel height 45
top band 20
bottom spout 20