Bottle cooler for the fridge

This project started when one of my friend complained that he could not cool his drinking bottle at work as quickly as he got thirsty.

I made this holde, where he can put one half liter soda bottle or can in and put it in the fridge. The bottle is then standing on top of an 80 mm pc fan than circulates the cold air aroud the bottle. The opening of the funnal part is 66 mm.

I have added a very simple controller with an arduino, though just a switch so you could control the fan manually wou