def find_containerName_by_containerId(containers_list, container_id):
    """
    Function to get containername based on container ID.

    Parameters
    ----------
    containers_list : list
        Containers list extracted from CVP.
    container_id : string
        ID of the container to search

    Returns
    -------
    string
        Container name. Default None if not found
    """
    for container in containers_list:
        if 'Key' in container:
            if container['Key'] == container_id:
                return container['Name']
    return None