guyver12 wrote:
I was confused by this on my first playthrough also.
Pick up the container, then hold the left mouse button down and move your mouse around-- the container should rotate in the direction you move your mouse.
One end of the container is open, just rotate it until that open end is facing you. Aim yourself into the container and press 1 to shoot into it. You might have to shoot a few times before the dialogue appears telling you it's ready.
Good luck.
Thanks man, this was really helpful.