How big, whats it look like ? Can you send us a picture?
If your cooler is this style, with the overlapping sliding doors on top, then you will first have to make the top surface flat and level.
I would recommend as a table top to get a solid piece of counter top, rather than laminate, as the edges can be finished completely. This will make the table much more durable, and easier to clean.
Place 1/2" clear glass top that overhangs edges approx. 12".