what does vault 13 canteen do?

[AUXOV]

It does nothing so far I can tell. Can I throw it away or sell it? And I won't have that "you took a sip from your trusty vault 13 canteen" notification I guess?

[baddude1337]

If you are playing in hardcore mode you need to drink. Having the flask makes you automatically drink from it, pretty much making it a cheat item for hardcore mode as it never runs out either. I think it also gives you some HP for each drink.

[E3kHatena]

It restores a little HP every minute or so, usually patching up the last bits of damage nto worth using a cola or Stimpak over.

Much more useful on Hardcore, admittedly.

[AUXOV]

I see. I just play normal mode, so I might get rid of it. thanks.

[N0P3]

Stupid to get rid of it.
It gives you hit points back like eating even in regular mode.
The flask is light weight requiring little room in inventory as well.
You paid for the DLC use it.

There is an achievement for playing hardcore and it is a bit more challenging; you can also lose your companions if they're killed forcing you to think strategically. Many prefer not to play the mode, but eventially you will be good enough andyou did pay for the game so get your mileage out of it. Hardcore was the way I first played NV before any DLC was available and made it through so there is no reason not to with GRA and Courier's Stash.

Fabricating and dissemenating auto-injector stimpaks to your companions will help keep them alive allot longer in addition to choosing your battles more wisely; go after the weaker enemies then team up on the stronger ones, isolate, divide and conquer - natural selection is an excellent weapon - all battles are won first through reasoning.

Enjoy!

[Cherry]

the canteen doesn't prevent you from getting dehydrated in hardcore mode either. It just makes it slower, which makes it a bit more fair and realistic.

[Discreet_Pigeon]

When I first started playing New Vegas I always sold the canteen because I thought it was useless junk until one playthrough I I noticed it gave me life every so often I then facepalmed myself for ever getting rid of it in most of my playthroughs.