My daughter has a feeding tube and we needed a portable solution to keep the pump and bag together while we're out. I used a ¼" hex screw to secure the pump, but you should make sure that the screw has the same thread pitch as the pump before assembling.
The bag fits securely in a groove and there's a notch for the tube end when not hooked up.
I printed this out of Jessie Ice Purple PLA without any supports.
The author marked this model as their own original creation.