They just dont pack liquor kits. They provision the planes with all catering supplies, sodas, ice, etc, and they go to LSG and pick up the food and bring it to the plane and bring back the used items.
There is only one or two people who make the kits.
Guess you never worked catering especially the European flights where you have to follow USDA procedures of international food and trash. And they cater a multitude of flights per bank.
Express in CLT is handle by Piedmont, except the E170s, and E175s which are handled by mainline.