Where did the "i liek chocolate milk" meme originate?

The "I liek chocolate milk" meme originated from the spread of chocolate milk threads on image-board sites such as 4Chan. These posts inspired many responses and related posts, including this meme.

The chocolate milk threads involved users posting a picture of chocolate milk, declaring a love for the drink and asking other users to watch it for them, which was either responded to with assenting or dissenting comments and pictures of spilled chocolate milk. This trend became popular across these sites, and many images and comments referencing the joke found their way into posts, both relevant and not, across the Internet.