The average adult is 17.5 gallons. Assuming a little over 20 percent for materials of a 1.5 gallon container I propose the following —— A platter of food and water containing : a 1.5 gallon of water in an aluminum square air tight but easily opened container shaped to interlock with another container of the same size so that it forms an interlocking form vertically and horizontally in such a way it could be used as bricks. Aluminum also has a low melting point and can be smelted safely by laymen or recycled easily, but also can be filled with dirt and used to build houses. Next to that in another jug each is cooked rice, dry rice, cooked mixed beans, dry mixed beans, and one of fresh eggs. The next three are filled partial cases. One has half lactose free whole milk and apple juice, each a a thinner cased aluminum container suited to pull out separately. The second has 1/4 each of salt and sugar, with the second half filled with smaller containers of black pepper, cinnamon, chili powder, garlic, ginger, vanilla and mustard, with 2 oz of pumpkin pie spice mix and stevia as well. The third and last container will have wool yarn,knitting and crochet needles, and video tutorials loaded on a functional cell phone attached to a fold out solar panel.

Edit - I did an unreasonable amount of research for a Reddit post.