I was just at the UPS store the other day to mail a 6 pack to my brother. They told me that they don't ask what you are shipping, just the value of the contents. I told them what I was shipping anyway and all they told me is that if the bottles break in shipping and happen to damage another package, I could be liable for the damage to any other packages. Mailed them anyway, haven’t heard anything, so they must have been fine.
Brewers make wort, Yeast make beer!!!!