If you have a 2015-2019 Subaru Outback and a 32 Oz Hydroflask or similarly sized bottle, where do you put the bottle? Do you put it in the center console or do you put it on the floor, risking your safety and the safety of everyone around you? No. You print out this model and shove it in your cupholder.

This adapter is designed for a snug fit in your cupholder. It holds the bottle securely, but not so tightly that it's difficult to remove. The included .3mf file applies a fuzzy skin to the lower section of the adapter to increase friction while keeping the upper half smooth (tested with BambuStudio - not sure about other slicers).

This was tested on a 2018 Outback with a 32 Oz Hydroflask. Your mileage may vary with other years, models, or bottles.

I recommend printing in PETG or other UV and heat resistant material.