Need some help with my cooler

Heres what I got. I have a 150 quart coleman extreme cooler that I use when I do concessions to hold canned drinks and bottled water. I usually offer a few varieties of drinks. My problem is once they are placed in the cooler and iced down...I have the hardest time finding the specific drink. basically I cant see whats in there and I look like im bobbing for apples to get what the customer wants. That being said, my cooler has slots in the side walls that i assumed were for dividers. This would make since and would help me separate the different drinks. But after searching the net, I cant find any dividers for it. Any ideas on homemade ones? Or links to where I can purchase them?

I knew my brothers would have the answer! Thanks alot guys!