Drank his own urine rather soon (??)
On one of the first nights (after he's repaired his boat) the character pours 2 glasses of a yellow substance and guzzles it down.
1.) Why is he storing his own urine at that point, when there's cans of food and stuff (which probably contain SOME water) around
and
2.) Why doesn't he wait until he's really dehydrated and desperate??
This part of the movie didn't make sense.
.