This 3d printed six pack can holder works great! It took me multiple tries to get the cans to hold in good and tight but as you can see in the video, they now hold in very tight and are still easy to put cans in and remove them.
I printed this in 95a TPU and PLA for the handle.
PETG may be a better choice for the handle but so far I have had no issues.
Handle prints laying down and slots into the 2 handle base pieces.
The handle bases go through the TPU and then the handle slots into the bases.
When assembling make sure the beveled part of both the TPU and the bases is facing up, it is for easier assembly and on the TPU the cans just snap in better.