We are branching out with more accessories!
Our new cup holder adapter is perfect for your oversized water bottles - we have tested this adapter in various makes and models and have found that it fits great into many stock cup holders measuring 75mm (3") or larger in diameter! For detailed dimensions/specs refer to the drawing attached to this listing.  
This cup holder fits bottles with a diameter of 3.5 inches or less. It also does a great job of holding large cups from fast food restaurants and even large Yeti cups! 
If you would like a custom adapter with different dimensions for a larger or smaller bottle please reach out and we can make that happen. 
This also functions as a cup holder riser, for an elevated placement of your bottle. 
Made from 3D printed PETG plastic, this piece is both tough and heat resistant. 
Please inquire about any additional color options/customizations.