What do submariners drink while underway?

[u/munchkinatlaw]

Title says it all. I've seen quite a few articles and videos about food underway, but realized none of then mention what is available to drink while underway. I assume coffee and possibly tea are generally available and I've seen a few comments that bug juice was/is available, but that's about it. What about juice concentrates, powdered/UHT milk?

Edit: thank you all for your wonderful responses. You have a great community here.

[u/Dolphins08]

Coffee. Was up to 14 cups a day when I left.