This is a Bald Eagle Bottle Opener that looks really great.
For the long-term usage of the device there must be a thin layer of hard material (e.g. Aluminum) to cover the upper portion of the eagles beak.
Other then that this ought to work and I hope it inspires you for doing other projects.
First of all I suggest printing this item with PLA for the right amount of durability and the main significant print settings are:
Infill Density: 0.2
You should try to maybe cover the used region of the upper portion of the eagles beak.
If all this has been completed you should be good to go and open a jar. :)