Experimental build: fa35f4a
I attempted to drink water while dived underwater. It went through the usual prompt of asking me to fill a container, to which I declined. The game followed that up by asking if I wanted to drink from my hands. I chose yes, and the game told me I can’t do that underwater.
I couldn’t surface after that for some reason, and discovered I was encumbered by going past my volume limit.
I was carrying one water. Not in a container, just pure water. I was able to gather extra water by repeating the process.
Just dive underwater, and try to drink from your hands.