Bright Yellow Runechalk

Chalk One Up. As an action, you can use this chalk to draw a simple symbol. A creature must have an Intelligence score of at least 8 to draw these symbols. Identical symbols do not stack. You can draw up to 20 symbols with this chalk before it is completely used up.
  Droplet on a container. Fills the container with up to a pint of your favorite ale.
  Cloud on a container. Fills the container with up to a gallon of water.
  Eye on a container. Fills a container with a pint of lamp oil.
  Cross on a container. Removes 1 pint of non-magical liquid from a container.