Method and apparatus for carrier

A method comprising the steps of:

• forming a plurality of carriers;
• placing each of the plurality of carriers in a first state;
• stacking the plurality of carriers on top of one another in a transportation vehicle, while each of the plurality of carriers is in the first state;
• wherein each of the plurality of carriers:
• has first, second, third, and fourth sides;
• and
• a floor;
• wherein the first, second, third, and fourth sides are attached to the floor so that the first second, third and fourth sides can pivot with respect to the floor, and so that each of the first, second, third, and fourth sides can be placed in the first state in which each of the first, second, third, and fourth sides are parallel with respect to the floor and in a second state in which each of the first, second, third, and fourth sides are at a ninety degree angle with respect to the floor;
• and wherein at least one of the first, second, third, and fourth sides has a bottom protrusion which can be adhered to the floor in the second state, to hold at least one of the first, second, third, and fourth sides in the second state.