SpellsCharm
Aguamenti
A charm that produces water from a wand. In the cave Harry tries to give Dumbledore water after the potion, but the water disappears before he can drink it. Harry later uses the charm on Hagrid's burning hut.

In the books
Harry Potter and the Half-Blood PrinceChapter: 11
Ron reminds Harry that they need to practise the water-making charm taught by Flitwick.