Do any of you cart builders have any advice/resources for building one of those built-in cold drink boxes like you see on some New York style carts? I'm building a new cart, and I have just about finished blocking out the equipment in my 3d software. My goal is to have everything onboard the cart, and to avoid the use of a separate table, and cooler. I'm not looking to drop an igloo cooler into a hole in the deck of my cart. I want to build a box that is built in to the cart, with a sliding cover, or maybe an insulated hinged cover that would be flush with the top of my deck. A permanent part of the cart, with a drain for the melted ice. Any ideas/photos/plans on constructing such an animal would be greatly appreciated.