Cup Holder - Power Bank Holder
This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/4LclI2THhZ4
Tired of having my powerbank fall into the trashcan underneath the cupholder I was simply setting the power bank in, out of necessity I designed this thing. It's got 1-2 mm walls and is completely hollow on the inside except for the walls to hold the power bank, which are 1-2 mm thick as well. This will fit nicely, but not snugly into a 2 1/2 inch by 2 1/2 inch cup holder.
This was designed for the Anker PowerCore+ 20100mAh USB-C, but should fit similar power banks. Remember, there's an edit link above so you can edit the fit.