The notes are copied from the children posts. Thanks, Prody and Tayan.

I'm still not sure what tsuchinoko meant by drinker in this context because that's exactly what she said.

Prody said:

I'm still not sure what tsuchinoko meant by drinker in this context because that's exactly what she said.

A brief search on Twitter suggests that イケるクチ has wider meaning than drinker.

It is somewhat informal phrase and may well have a meaning that is not on a dictionary.