With fake object

hello_world.module

<?php
/* $Id$ */
/**
 * @file
 * Very simple DRUPAL module
 */

//see all messages for debugging
error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);

//Because we need the twig-lib for the hello world example
//actually you should add this in index.php
require_once './vendor/autoload.php';

/**
 * Implementation of hook_help().
 */
function hello_world_help($section) {
    switch ($section) {
        case 'admin/help#hello_world':
            $output = '<p>Hello world help...</p>';
            return $output;
        case 'admin/modules#description':
            return 'Hello world module description...';
    }
}
/**
 * Implementation of hook_menu().
 */
function hello_world_menu() {
    $items['hello'] = array(
        'title' => 'Using Twig with Drupal', // page title
        'page callback' => 'hello_world_page', // callback function name
        'access callback' => TRUE, // every user can look at generated page
        'type' => MENU_CALLBACK // define type of menu item as callback
    );
    return $items;
}

/**
 * Implementation of hook_page().
 * Using Twig Engine for output.
 */
function hello_world_page() {

    $loader = new Twig_Loader_Filesystem('./twig');
    $twig = new Twig_Environment($loader, array(
        'cache' => './twig/_temp',
        'debug' => 'true'
    ));
    
    //fake object
    $td = [
        'class'=> 'default',
        'image' => 'holder.js/372x134/auto/',
        'title' => 'myTitle',
        'text' => 'Teaser Text Teaser Text Teaser Text Teaser Text Teaser Text Teaser Text',
        'content' => [
            'featureList' => [
                'one',
                'two',
                'three',
            ],
            'priceValue' => '54',
            'priceUnit' => '€',
            'percentage' => '23%'
        ]
    ];
    
    $ret = "";
    $ret .= $twig->render('test.html.twig', array(
       'teaserData' => $td
    ));

    return $ret;
}