Purchase a Cork Shaped Rechargeable USB LED Light for under $3 from AliExpress, Gearbest, Bangood, Amazon, or Ebay.
I have purchased rechargable corks from different sellers. Some of the cork cones are larger diameter than others.
Print at 102% if your cork diameter is larger than the plastic housing diameter. Print at 100% if your cork is flush with the plastic housing.
Big Clive did a great destructive teardown video of the LED cork light! FYI, out of nine lights that I purchased from China, one was defective, it would light up but not charge. Using Big Clive's video as a reference, I pulled on the USB connector so I could inspect the circuit board. I saw that one of the joints was missing some solder. After soldering the joint, it worked like a charm. Thanks, Big Clive!
Feel free to edit this model on Tinkercad.