You see a water cask.
Location
You can find these throughout whole Tibia, in most cities and in some buildings and creature settlements.
Notes
It can be used to fill Fluid Containerss with water.
It looks the same as a Beer Cask, a Lemonade Cask, a Cask of Brown Ale, a Cask of Brown Ale (Item), a Rum Cask, a Small Cask and a Wine Cask.