Fantastic to have a cooler with a hinge with 100% chance of failure due to general use. Well, you can print a replacement using this model using amazing TPU filament.

I chose to design it pretty thick to provide support to the lid. I'm sure less TPU would not break, but would be less good as a hinge. The screw holes are undersized on purpose to provide more grip under the screw head.

The perimeter wall on the screwhead side in intended to prevent the screws from rubbing against things. Let me know if you think I should make this wall different.

Sorry it's oriented in the wrong position, I need to learn how to fix that in F360.