This is an adapter to make the insulated tube of the “CRUX Thermal Control Kit” fit the “Magnetic Tube Trap” that some Camelbak backpacks use.

You might want to add a rubber band or something similar around the tube to secure it into the adapter!

I printed the adapter in PETG since it is a bit more robust but PLA might work just fine.

You can also download the Fusion360 file and make some modifications yourself.