Ice Pack Funnel

This funnel makes it easy to add ice to refillable ice packs. Simply screw it into the opening and fill it at a refrigerator ice maker or dump the ice in some other way.

It was designed to fit the threads of these Bicaree branded ice packs: https://amzn.to/3XqVsXh
I suspect that it will also fit other similar refillable packs. An STL without threads is also available