EVA suit portable water dispenser
(enables astronaut in space-suit to drink while doying EVA)
(http://www.hq.nasa.gov/alsj//Feedport4.jpg)
In MCO, when a player suits-up EVA Gear he can no-longer eat or drink.
Tadays EVA-suits have an energy-bar and water dispenser inside the helmet.
On Mars that is unfortunately not possible (or at least - it's not likely).
The reason is, that Mars suit's have to be redesigned for monts of usage.
HOWEVER!
There is an easy technology that enables at least DRINKING WATER while on Mars conditions.
Astronaut can have in his suit a so-called "Water Port".
If he wishes to drink some water, he simply take's out the "EVA suit portable water dispenser" and connects it to the water port.
Astronaut sees then a straw on which he can suck.
Player could carry one of them in his hand, and use it when needed
(personaly - I would like to have one in the trunk of my Rover - just in case :-) ).
The water dispenser must be heated so it should have a battery, that needs to be recharged from time to time.
Portable water dispenser becouse of the insulation could look like a thermos.
It could look like that: http://www.promolife.com/images/uploads/newalkapod.jpg (http://www.promolife.com/images/uploads/newalkapod.jpg)
Actually...come to think of it...if you could dissolve some nutrients inside the "EVA suit portable water dispenser" you could EAT while drinking.
Some more info about that topic: http://www.hq.nasa.gov/alsj//alsj-DrinkFood.html (http://www.hq.nasa.gov/alsj//alsj-DrinkFood.html)