Stackable rolling coolers with affixed main bin

A kit of coolers, comprising a main bin, comprising front, rear, left, right, top, and bottom surfaces, at least two wheels on the bottom surface, an extendable handle protruding upward from the rear surface, and indentations in the top surface;

• at least one modular bin, each comprising front, rear, left, right, top, and bottom surfaces, indentations on the top surface having the same size and shape as the indentations on the main bin, protrusions on the bottom surface, sized and shaped to fit securely within the indentations of another modular bin or the main bin, and vertical grooves on the rear surface, sized and shaped to securely fit around the extendable handle of the main bin;
• a drawer in each bin (the main bin as well as the modular bins), opening from the front surface of the bin and comprising front, rear, left, right, and bottom surfaces;
• dividers in at least one drawer;
• a trapdoor on the top surface of at least one bin, with a shallow indentation underneath each trapdoor.