there are two reject bins, an external one for customers to get the coins coinstar doesn't take, then an internal one for catching junk the screen doesn't shift out and the really beat up or too big of a coin. I have found many of Ike dollars in the internal reject bin because they are just too big to go through the external one. External ones are for any customer or person with a sharp eye to get coins left behind. rather than do the scoop method to check, run your fingers around the edges. I have found many of silver dimes caught and hidden by the inch high ledge in the reject bin. Hope this helps.
Sincerely, Garoulady