What money will the cola machine accept?

Hint 1 of 9:

Only a special coin will do.

Hint 2 of 9:

Get a grip on the situation.

Hint 3 of 9:

Review the television videos for a clue.

Hint 4 of 9:

Watch the video "Get A Grip" and notice the picture that is repeated over and
over.

Hint 5 of 9:

Do you see a window in the market?