Rainliquor

Rainliquor is strong alcohol drink that was obtained by pouring small portions of vodka or any other hard drink from (not only) parents' opened bottles, in a way that the contents of them seem untouched.

Rainliquor is popular among highschool or college students because of age restrictions on buying alcohol.

He collected some rainliquor and brought it with him.
I've been harvesting rainliquor whole week, about to get wasted!