ND Miata cup holder insert

I found the stock cup holder in the ND Miata too small for larger drinks so I made this little insert. It allows you to retain the full functionality of the original cup holder but also use larger cups and water bottles. I sized it to fit my Nalgene bottle but you could make it bigger if needed.I printed in PETG for thermal resistance but you could probably use other materials such as ABS or nylon.I am new to 3D printing and CAD so let me know if I can make any improvements.