Rechargeable battery pack holder

I have a small rechargeable cylindrical battery pack, and keep in plugged into my car to keep it charged. Being round, it has a tendency to want to roll around, so I decided to make a simple holder that could attach easily to the interior of my car and keep the battery pack handy.

Note that if you life in an area where the interior of you car gets above 50-60 degrees C (122-140 degrees F, which isn't really all that hot), standard PLA will start to deform, so you'll want to use high-temp P