Knowing how to make your own cooler box is a skill that can come in handy in a pinch. You may need one for an impromptu picnic, or to keep drinks cold on a spur of the moment outing. Fortunately, you don't need much to make a cooler and in most cases everything you need can be found around your home. You just need to create a box that insulates and prevents moisture from leaking.
Line a cardboard box with sheets of polystyrene foam to help insulate it. Use duct tape to hold the polystyrene foam in place.
Put a bin bag inside the cardboard box. Fold the top of the bag down over the top edge of the box and tape it to the box so there are no seams or openings.
Line the inside of the box with aluminium foil to increase its insulating properties. Cover the top, bottom and sides. Place it right over the bin bag and tape the aluminium foil down with duct tape.
Cover the lid of the box with a bin bag and aluminium foil. Use the tape to pull both taut, so the lid fits snugly on the box.
Fill the box with ice or cold packs and put your food and drinks inside. Leave the lid on the box as much as possible to keep the items cold.