We love our Hydraflow insulated water bottles, and both the small and large ones are too big to fit in the drink holders of our 2022 or 2023 Kia Souls.  I am not skilled in CAD use yet, but the Bambu Slicer has a lot of great tools for modifying and combining parts.  I was able to adapt a model another person made by enlarging & adding shapes and negative shapes within the Bambu slicer, and these turned out perfect.  

• 15% sparse gyroid infill with auto supports 
• printed in PETG to accommodate high summer temperatures in a parked car  
• I also randomized the layer height changes to avoid a seam

Using either of the large ones partially blocks access to the 2nd drink holder due to the big-size of these bottles, but the small ones work nicely in tandem, so there is a plate with 2 if you use the smaller 90mm diameter bottles.