Jar

From Zelda Wiki.org

Debuting in A Link to the Past, ceramic pots or jars are found in most games in the Zelda series. When broken, they reveal items such as Rupees, hearts, fairies, bees, arrows, bombs, water, and even Ooccoo. They can be found in houses and dungeons, and sometimes they look like vases. Pots can be broken by throwing them, rolling into a wall with a shelf that houses them, or striking them with a sufficiently powerful sword. They are not to be confused with Magic Jars. Link's fascination with breaking jars is made fun on in Twilight Princess when he examines them eagerly in Hena's Fishing hut, and he can even be expelled from the fishing hut after multiple attempts to break those pots with roll attacks into the wall.

Water Pot

This is just a large pot filled with water. Used in The Wind Waker for temporarily cooling and solidifying lava so Link can travel across safely. These are found mainly within Dragon Roost Cavern.

Expensive Jar

Found only in The Legend of Zelda: The Wind Waker in the auction house, these are shiny blue and white jars that decorate the first floor. If Link breaks one of these jars while Mila's Father owns the house, he will not be allowed to leave until he pays the necessary amount of rupees to pay for the broken jars. After ownership of the auction house passes to its new owner as the game progresses Link is no longer fined for any jars he breaks.

The player can get away by saving the game a quitting. Upon returning to the house, there will not be any fines. This is useful for getting the red rupees that Mila's Father throws down when Link "requests" financial aid.