Vehicle's cupholders are sized to hold todays large drink cups.
That leaves your typical energy-drink-sized can vulnerable to tipping when cornering or decelerating (or accelerating if you're in a Tesla) rapidly.
This is my solution. A cupholder sleeve that has an inner diameter to match the small can size.
There are two sizes; a short and tall. In a Toyota Tundra, the front-most console cupholder is slightly tucked under the center dash, and shallower than the others, so the taller sleeve cannot be used there. In the "main" cupholder, the taller sleeve is the same depth as the cupholder.
The holes are simply decorative, save plastic, and provide finger-grips to easily remove.
Printer: MakerFarm Prusa i3
I used 70% infill to get a fairly solid print with a descent density/weight.