Water

Water comes in various forms in World of Warcraft:

1. What you swim in.
2. A form of drink used to generate mana while out of combat. Mages can conjure various levels of it.
3. An ingredient for various recipes.
4. A type of quest item.

Types of water as drinks

•  [Refreshing Spring Water]
•  [Bubbling Water] (req level 15)
•  [Enchanted Water] (req level 25)
•  [Bottled Winterspring Water] (req level 35)
•  [Bottled Alterac Spring Water] (req level 55; BoP)
•  [Conjured Water] (from level 5 spell)
•  [Conjured Fresh Water] (from level 15 spell; req level 5)
•  [Conjured Purified Water] (from level 25 spell; req level 15)
•  [Conjured Spring Water] (from level 35 spell; req level 25)
•  [Conjured Mineral Water] (from level 45 spell; req level 35)
•  [Conjured Sparkling Water] (from level 55 spell; req level 45)
•  [Conjured Crystal Water] (from level 65 spell; req level 55)
•  [Conjured Glacier Water] (from book, level 70 to make; req level 65)

Types of water as ingredients

•  [Elemental Water]
•  [Globe of Water]
•  [Essence of Water]

Types of water as quest items

Too many to mention, but here are a few more interesting ones.

•  [Stratholme Holy Water] (also damages undead)

Types of water as skills

Some shaman skills have water elemental magic involved.

The mage's ice spells technically uses water, but in a solid form. In World of Warcraft, water and ice seem to be separate elements, being just the same element in different physical form.