Pot

Pots, not to be confused with Clay Pots, are a common sight in Terraria. Pots usually appear underground, however pots can be found on the surface, generally only under overhangs or near caves. When smashed with any tool or weapon, they have a chance to drop Coins and/or a random common item. Pots cannot be picked up. Pots have had their texture changed to look more like clay in the recent 1.0.5 update.

Loot
As of 1.0.5 patch, the loot from pots is leveled according to the biome in which they are found.

Cavern and surface

 * Lesser Healing Potions
 * Copper or Silver Coins
 * Bombs
 * Wooden Arrows
 * Torches
 * Glowsticks
 * Special Potions (Although very rare)

Underworld

 * All possible of dropping from pots in caverns
 * Hellfire Arrows
 * Healing Potions
 * Special Potions