Malacca-max relfects the fact that a draft of 21 m is the maximum permissible draught through the Malacca Strait.
With the intended increase of the cross-section breadth and depth of the Suez Canal over the coming ten years, the 18,000 teu container ship will also be able to pass the Suez Canal. On the other hand, a future container ship with a draft of 21 m would require existing harbors to be dredged. Today, only the harbors of Singapore and Rotterdam are deep enough.