Mine was.  If I put a can in the larger (right) side, it would not want to stay there.  Left side, it was pretty much OK.  Right side, over it goes when I turn left.  My truck was suffering from having what has often been correctly call a "cup thrower" instead of a cup holder.  This was not a bad design when the truck was new, but after holding hundreds of cups and cans over the years, the rubber "ears" that used to hold the cup or can upright have become ineffective.

How do you know if you have a "cup holder" or a "cup thrower" in your truck?  The first clue is that whatever you put in the right side winds up on the floor when you turn left.  The second clue is that it looks like this: Note the rubber "ears" at the front and back of each side, and how they have "flopped down."  The opening to the right side is wide open, and wider at the top then at the bottom.  A normal size can will fit right through on its way to the floor.

So out is goes.  I bought a new cup holder at my local Ford dealer for $37.10 plus tax.  I got Ford part number YC3Z-2513560-CAD, which matches (almost) my gray interior.  Two other colors are available, all with the same part number except for the last letter.  CAB will get you a Parchment color one and CAF will get you a Prairie Tan color one.  Here is what it looks like: Now this beauty has spring loaded "fingers" on the sides that will really hold the cup of can in place.  Note that the part includes the metal support and slide assembly, another improvement from the earlier "cup thrower" design.  My old one could easily be removed (often when all I wanted to do was pull it out), while this one cannot be removed from the support and slide very easily.  The new one also includes a "floor" to support the cups and cans, so even small items will be secure in this one.

The change takes about 20 minutes and requires only one tool, a 7mm socket and extension on a ratchet.  You can also use a 7mm box or open end wrench, but you will find the ratchet really speeds up the job.  There are eight screws to remove and replace.  Four of them are for the ash tray, and four of them are for the cup holder support.

Remove the ash tray by springing the upper metal piece down while pulling the ash tray open.  The "button" on the ash tray support pops out of the springy steel piece and the ash tray pulls on out.  Here is a picture of the ashtray removal: Next, remove the four screws that hold the ash tray support to the dash.

Two screws are at the bottom and one is on each side.  Remove the ash tray support and set it aside.

Next, slide the cup holder out of the support.  Now, remove the two screws from the front of the cup holder support.  Here is a picture from the support front screws.
There are two more screws on the bottom of the cup holder support.  This is why we had to remove the ash tray.  The screws are located right above the ash tray and an extension really helps here. This is what the bottom of the cup holder looks like.  You can see the two screws.  Sorry about the lens glare.  My UV filter is scratched and I had to remove it, and have not replaced it yet.
Now, slide the cup holder support out of the dash and slide the new one in.

Put in the two front screws first, followed by the two bottom screws.  The bottom ones will not be as easy to do as removing them from the old support because the new cup holder cannot be removed from the support.  Last, place the ash tray support in position and put in the four remaining screws and snap the ash tray back into the support.  That's it, all done.  Now, grab an ice cold soda from the fridge and try it out on any road you want.  Unless you tip the truck over, the cup holder will do the job.