Containerization has changed our world and enabled globalization as we know it. The invention of the container significantly facilitated the transportation of various types of goods and enabled enormous progress in transport technology. However, in addition to all its advantages, shipping containers by sea also has disadvantages, such as emissions of harmful gases from ship engines and cargo handling equipment at port terminals, which pollute the environment and negatively affect people's health. Therefore, it is necessary to make the transport of containers by sea more sustainable. The paper presents some of the methods by which the technology of transporting containers by sea is tried to be made more sustainable, such as reducing energy consumption like slow steaming or route optimization and the use of alternative energy sources for the propulsion of container ships such as liquefied natural gas, as well as measures that undertake at container terminals. Automation and digitization of the transport process, along with the use of smart containers, are the future and represent the path towards a sustainable and safe technology for transporting containers by sea.