Here's how this works. I have made a picture of a glass of milk. I have posted it in this thread. The nest person saves the picture into their computer (I do this by putting the arrow over the picture, right-clicking, and clicking "save picture as"), opens it with "Paint", and paints black over  1/5 (one fifth) of the contents of the glass, and passes the glass on. The next person does the same, and when the glass is empty, the person after the one that emptied the glass fills the glass with their beverage of choice (orange for orange juice, brown for chocolate milk, red for cranberry juice, etc.) and posts it. Here is an example:

I have posted the full glass of milk.

Next person: "Thank you kindly. *Swallows*" [paints black over 1/5 of the contents] "*to next person* here you go, friend!"

Random Person : Hey, thanks dude, I could use this refreshment. *Swallows*" [does same as last] "*to next person* Don't be a stranger, have a sip!"

Another random person: "I appreciate that. I was getting thirsty. *Swallows* [does same] " *to next person* Here ya go, man"

Another person thanks the last, takes a swallow, paints black over another fifth of the contents, and passes it on.

Another person thanks the last, swallows, paints black over a fifth, and passes on.

The next person has possession of the empty glass. He saves the picture, opens it with paint, and paints 4/5 (four fifths) of the glass.. say... Orange. "I have filled the glass with orange juice, and taken a sip. *Passes to next person* Here you go, pal."

Make sure you thank the person who gave it to you, and then say something to the next person, so there are enough words being posted to keep the thread open, okay?  And make sure you REPLY to the last person.