This item was inspried by my fiancee and her gigantic 40oz water bottle that just didn't fit in the front seat cupholders. This will work perfectly with 32oz or 40oz Hydroflasks and similar.

I designed this device so that as well as holding a 3.6" (9.1cm) diameter water bottle, it also allows for usage of regular size water bottles. Both pop out tabs still function to keep a smaller bottle tight and in place. The sides extend nearly 2 inches beyond the bottom of the water bottle so even in hard braking situations, your top heavy bottle won't go flying. Trust me, I tested!

These are 3D printed in PETG so they are UV and heat resistant to nearly 150°F (65°C)