This is a 3D Printed Black Yeti Cup Adapter that a customer had contacted us to print. They sent us the file and we checked it our and repaired any minor flaws. We then printed one to make sure the sizing was correct in the file (it happens that it can be off as going between programs can cause fluctuations in the calculations) and when we knew it fit as it should they ordered more. The model was printed with PLA Filament on an FDM 3D printer.