The file 'PET Bottle Funnel With Integrated Ventilation 3D Printer Model' is (stl) file type, size is 898.1KB.
A little funnel that fits on a standard PET bottle. The ventilation system is integrated within the funnel walls so it can't break off.
I printed it without supports, brim or raft and it works fine right off the bed.
PET_Bottle_Funnel.stl | 2.3MB |