Hi guys, thanks for your answers and sorry for two frantic double posts.
I flipped the laptop, and went to sleep with a fan boring into it at max speed. At this point, the battery indicator button wouldn't show anything, and the laptop wouldn't turn on.
After about 4 hours, for some reason I woke up. After much silent deliberation with my sleeping dog, I decided to try the battery indicator - it worked

I then tried to turn on the Macbook, and voila, it worked

I was so happy that I watched a episode of The Mentalist, after which I turned off the laptop and left it the rest of the night drying.
So, lesson learned. Never again will I drink next to my laptop
Oh and it wasn't soda as in coke. It was soda water, as in just sweet water (like for shandies).