I have been asked by a Colombian friend to bring a few bottles of alcohol with me (from the US) when I visit Colombia next month.  After some research I have found that I can bring *two (2) bottles* of alcohol into Colombia, but I have been unable to find the maximum **size** of bottles allowed.

**Is there a *maximum size restriction* to the bottles (I'm assuming 'yes') and, if so, what is the size restriction?**  

Bonus points if you can reference a source.  ;)