Parrot neck collar.

thingiverse

A vital accessory for parrots and other birds, this collar requires two printed items. First, wrap it snugly around the bird's neck, then secure it firmly with a cable strap. Next, attach a pet funnel - similar to those used on small cats - and hold it in place with another cable strap. I successfully employed this solution on a Congo African Grey parrot suffering from a fractured wing. The prints are free of support issues, but a 3mm drill may be necessary to adjust the holes for a perfect fit.