AFAIK in the older versions it was like that: you could unload a liquid container and pour the contents in another container or on the floor by using Unload, but for me it doesn’t work anymore. It just says: You can’t unload a plastuc bottle of water!
I tried to 'U’nload a jug of bleach, but I couldn’t. I wanted to use it to carry water. I’m playing the 0.5-72-g7eff9b9-dirty build.
Yeah, got broken recently (when I was stopping M72 LAWs from being unloadable). Should be fixed by now, in a version that post-dates Rexor’s by a day or so.