How do I get food

Hint 1 of 5:

Your kit has some in it.

Hint 2 of 5:

Don't go one until you've been to the Kitchen.

Hint 3 of 5:

There's a food dispenser there. Just put the canteen in the niche.

Hint 4 of 5:

Then, press the button. You probably should close the canteen...

Hint 5 of 5:

...just in case it falls out of your hands.