A well geared character will never need to drink during a raid or a heroic, but in arena things are a bit different. Especially if you have a mage in your team, it’s vital to ask for “cookies” if they forget to make some and use them if necessary. But in case you have too many abilities and macros, it’s going to be quite hard to find a convenient slot for your food and water.
So, I’m going to provide here a few solutions, but first, I have to speak a little about the importance of such a WoW keybind.
Many players just open their inventory and click on the mage biscuits to regenerate, but that requires additional button hits and clicks. In arena, this fact will cut off a little bit of your effectiveness. You may lose precious seconds that might cost your team the match.
A good solution to key bind your food and water is to pop the additional right bars. You can slot your treats there, without any WoW keybind, being close for a click.
However, you can even do better than this. You can construct a macro for your food, combining other HP or mana healing abilities with it. For example, a druid can put on WoW keybind, a macro that involves Innervate, Conjured Mana Cake and a Mythical Mana Potion in it, for a quick regen, in case of a large mana pool.
The potion won’t work in arena, of course, but in a BG, this macro:
/use Conjured Mana Cake
/use Mythical Mana Potion
… will be very handy.