Yes... condense vapor into liquid.

marinol uses a synthetic THC. However canada last year aproved Sativex which contains THC together with cannabidiol. it's a spray for the mouth to relieve certain pain.

why would i liquify THC? would you ask why people make cannabutter as well? please think about it...

in theory one might be able to simply place drops of it on food, or maybe even on ciggarettes that would be interesting, or add it to a drink. the posibilities are vast.