Koucha (red tea) = nickname for F/sn Archer
Ryokucha (green tea) = nickname for F/E Archer

And in this image Gilgamesh is alcohol for some reason.

So your choice of drinks are GAR, TOOL and well... I don't really know how to describe Archer Extra. I found him kinda bland.

Fangirls go wild over that stage 2 boss... for some reason.

Kotonoha: Reason Gilgamesh is associated with alcohol is because in Fate Zero, he literally pimped out a few bottles of wine. In his own words, they were "Wine fit for the gods".

Kotonoha said:
Koucha (red tea) = nickname for F/sn Archer
Ryokucha (green tea) = nickname for F/E Archer

And in this image Gilgamesh is alcohol for some reason.

I thought it was iced tea.

they are all archer class

...I'm not the only one who thinks it's weird that the Japanese Archer is with the English tea, and the English Archer is with the Japanese tea, right?