diff --git a/composer.json b/composer.json
index 9473cdd9..19306da9 100644
--- a/composer.json
+++ b/composer.json
@@ -13,6 +13,7 @@
     "ext-libxml": "*",
     "ext-pdo": "*",
     "ext-simplexml": "*",
+    "b13/container": "^1.3",
     "christophlehmann/imageoptimizer": "^2.0",
     "fluidtypo3/vhs": "^5.2",
     "georgringer/news": "^7.2",
diff --git a/composer.lock b/composer.lock
index 520ca868..de8853f9 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,71 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "bdb0e8fc25a5e98d75bea5bce07ec0bd",
+    "content-hash": "ea05a1b18e4476ff6c1421964d42a67b",
     "packages": [
+        {
+            "name": "b13/container",
+            "version": "1.3.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/b13/container.git",
+                "reference": "757ac6344789c7f70fc3335b928a0e84139145a0"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/b13/container/zipball/757ac6344789c7f70fc3335b928a0e84139145a0",
+                "reference": "757ac6344789c7f70fc3335b928a0e84139145a0",
+                "shasum": ""
+            },
+            "require": {
+                "typo3/cms-backend": "^9.5 || ^10.4 || ^11.0",
+                "typo3/cms-fluid-styled-content": "^9.5 || ^10.4 || ^11.0"
+            },
+            "replace": {
+                "typo3-ter/container": "self.version"
+            },
+            "require-dev": {
+                "b13/container-example": "dev-master",
+                "codeception/codeception": "^4.1",
+                "codeception/module-asserts": "^1.0",
+                "codeception/module-db": "^1.0",
+                "codeception/module-webdriver": "^1.0",
+                "helhum/dotenv-connector": "^2.3",
+                "helhum/typo3-console": "^6.3",
+                "ichhabrecht/content-defender": "dev-master",
+                "phpstan/phpstan": "^0.12.11",
+                "phpunit/phpunit": "^8.4",
+                "typo3/cms-about": "^10.4",
+                "typo3/cms-install": "^10.4",
+                "typo3/cms-workspaces": "^10.4",
+                "typo3/coding-standards": "^0.2.0",
+                "typo3/testing-framework": "^6"
+            },
+            "type": "typo3-cms-extension",
+            "extra": {
+                "typo3/cms": {
+                    "cms-package-dir": "{$vendor-dir}/typo3/cms",
+                    "web-dir": ".Build/Web",
+                    "extension-key": "container"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "B13\\Container\\": "Classes/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "GPL-2.0-or-later"
+            ],
+            "description": "Create Custom Container Content Elements for TYPO3",
+            "homepage": "https://b13.com",
+            "support": {
+                "issues": "https://github.com/b13/container/issues",
+                "source": "https://github.com/b13/container/tree/1.3.1"
+            },
+            "time": "2021-07-21T10:12:58+00:00"
+        },
         {
             "name": "christophlehmann/imageoptimizer",
             "version": "2.1.0",
@@ -677,68 +740,6 @@
             },
             "time": "2021-08-09T23:46:54+00:00"
         },
-        {
-            "name": "facebook/graph-sdk",
-            "version": "5.7.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/facebook/php-graph-sdk.git",
-                "reference": "2d8250638b33d73e7a87add65f47fabf91f8ad9b"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/facebook/php-graph-sdk/zipball/2d8250638b33d73e7a87add65f47fabf91f8ad9b",
-                "reference": "2d8250638b33d73e7a87add65f47fabf91f8ad9b",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^5.4|^7.0"
-            },
-            "require-dev": {
-                "guzzlehttp/guzzle": "~5.0",
-                "mockery/mockery": "~0.8",
-                "phpunit/phpunit": "~4.0"
-            },
-            "suggest": {
-                "guzzlehttp/guzzle": "Allows for implementation of the Guzzle HTTP client",
-                "paragonie/random_compat": "Provides a better CSPRNG option in PHP 5"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "5.x-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Facebook\\": "src/Facebook/"
-                },
-                "files": [
-                    "src/Facebook/polyfills.php"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "Facebook Platform"
-            ],
-            "authors": [
-                {
-                    "name": "Facebook",
-                    "homepage": "https://github.com/facebook/php-graph-sdk/contributors"
-                }
-            ],
-            "description": "Facebook SDK for PHP",
-            "homepage": "https://github.com/facebook/php-graph-sdk",
-            "keywords": [
-                "facebook",
-                "sdk"
-            ],
-            "support": {
-                "issues": "https://github.com/facebook/php-graph-sdk/issues",
-                "source": "https://github.com/facebook/php-graph-sdk/tree/5.7.0"
-            },
-            "time": "2018-12-11T22:56:31+00:00"
-        },
         {
             "name": "fluidtypo3/vhs",
             "version": "5.2.0",
@@ -1808,64 +1809,6 @@
             },
             "time": "2021-07-21T10:44:31+00:00"
         },
-        {
-            "name": "pixelant/pxa-social-feed",
-            "version": "v2.3.1",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/pixelant/pxa_social_feed.git",
-                "reference": "dfabd173eee203b575f28aab98181be3556e05b0"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/pixelant/pxa_social_feed/zipball/dfabd173eee203b575f28aab98181be3556e05b0",
-                "reference": "dfabd173eee203b575f28aab98181be3556e05b0",
-                "shasum": ""
-            },
-            "require": {
-                "facebook/graph-sdk": "~5.7.0",
-                "php": ">=7.1",
-                "typo3/cms-core": "^8.7 || ^9.5"
-            },
-            "require-dev": {
-                "nimut/testing-framework": "^4.1",
-                "squizlabs/php_codesniffer": "^3.4"
-            },
-            "type": "typo3-cms-extension",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "0.0.x-dev"
-                },
-                "typo3/cms": {
-                    "extension-key": "pxa_social_feed",
-                    "cms-package-dir": "{$vendor-dir}/typo3/cms",
-                    "web-dir": ".Build/Web"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Pixelant\\PxaSocialFeed\\": "Classes/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "GPL-2.0-or-later"
-            ],
-            "authors": [
-                {
-                    "name": "Pixelant",
-                    "email": "info@pixelant.net",
-                    "homepage": "https://www.pixelant.net",
-                    "role": "Developer"
-                }
-            ],
-            "description": "Add Facebook, Instagram, and Twitter feeds to your site.",
-            "support": {
-                "issues": "https://github.com/pixelant/pxa_social_feed/issues",
-                "source": "https://github.com/pixelant/pxa_social_feed/tree/v2.3.1"
-            },
-            "time": "2020-04-06T06:54:44+00:00"
-        },
         {
             "name": "psr/cache",
             "version": "1.0.1",
@@ -4764,6 +4707,51 @@
             ],
             "time": "2021-07-27T16:19:30+00:00"
         },
+        {
+            "name": "tritum/form-element-linked-checkbox",
+            "version": "2.1.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/tritum/form_element_linked_checkbox.git",
+                "reference": "acf3a430b37c6329833af305c011163ece04b45d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/tritum/form_element_linked_checkbox/zipball/acf3a430b37c6329833af305c011163ece04b45d",
+                "reference": "acf3a430b37c6329833af305c011163ece04b45d",
+                "shasum": ""
+            },
+            "require": {
+                "typo3/cms-core": "^9.5.25 || ^10.4.14",
+                "typo3/cms-form": "^9.5.25 || ^10.4.14"
+            },
+            "type": "typo3-cms-extension",
+            "extra": {
+                "typo3/cms": {
+                    "extension-key": "form_element_linked_checkbox"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "TRITUM\\FormElementLinkedCheckbox\\": "Classes/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "GPL-2.0-or-later"
+            ],
+            "authors": [
+                {
+                    "name": "Björn Jacob TRITUM GmbH",
+                    "email": "bjoern.jacob@tritum.de"
+                }
+            ],
+            "support": {
+                "issues": "https://github.com/tritum/form_element_linked_checkbox/issues",
+                "source": "https://github.com/tritum/form_element_linked_checkbox/tree/2.1.2"
+            },
+            "time": "2021-06-01T08:59:34+00:00"
+        },
         {
             "name": "typo3/class-alias-loader",
             "version": "v1.1.3",
@@ -7266,7 +7254,7 @@
     },
     "platform-dev": [],
     "platform-overrides": {
-        "php": "7.3.10"
+        "php": "7.4.13"
     },
     "plugin-api-version": "2.1.0"
 }
diff --git a/public/typo3conf/ext/ep_theme/Configuration/TCA/Overrides/tt_content_element_container.php b/public/typo3conf/ext/ep_theme/Configuration/TCA/Overrides/tt_content_element_container.php
new file mode 100644
index 00000000..25979a58
--- /dev/null
+++ b/public/typo3conf/ext/ep_theme/Configuration/TCA/Overrides/tt_content_element_container.php
@@ -0,0 +1,39 @@
+<?php
+
+call_user_func(function () {
+    \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\B13\Container\Tca\Registry::class)->configureContainer(
+        new \B13\Container\Tca\ContainerConfiguration(
+            'ep_container_thirds',
+            'Dreispalter',
+            '33/33/33 Aufteilung',
+            [
+                [
+                    ['name' => 'Elemente', 'colPos' => 300, 'colspan' => 3],
+                ]
+            ]
+        )
+    );
+
+    $headerConfig = [
+        'showitem' => '
+            --div--;LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xlf:palette.general,
+                --palette--;LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xlf:palette.general;general,
+                --palette--;LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xlf:palette.header;header,
+            --div--;LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xlf:tabs.appearance,
+                --palette--;LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xlf:palette.frames;frames,
+                --palette--;LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xlf:palette.appearanceLinks;appearanceLinks,
+            --div--;LLL:EXT:core/Resources/Private/Language/Form/locallang_tabs.xlf:language,
+                --palette--;;language,
+            --div--;LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xlf:tabs.access,
+                --palette--;;hidden,
+                --palette--;LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xlf:palette.access;access
+        '
+    ];
+
+    foreach (['ep_container_thirds'] as $field) {
+        $GLOBALS['TCA']['tt_content']['types'][$field] = array_replace_recursive(
+            $GLOBALS['TCA']['tt_content']['types'][$field],
+            $headerConfig
+        );
+    }
+});
diff --git a/public/typo3conf/ext/ep_theme/Configuration/TypoScript/ContentElements/container.typoscript b/public/typo3conf/ext/ep_theme/Configuration/TypoScript/ContentElements/container.typoscript
new file mode 100644
index 00000000..0d626c6e
--- /dev/null
+++ b/public/typo3conf/ext/ep_theme/Configuration/TypoScript/ContentElements/container.typoscript
@@ -0,0 +1,10 @@
+tt_content.ep_container_thirds =< lib.contentElement
+tt_content.ep_container_thirds {
+    templateName = Thirds
+    templateRootPaths {
+        10 = EXT:ep_theme/Resources/Private/Templates/Container
+    }
+    dataProcessing {
+        100 = B13\Container\DataProcessing\ContainerProcessor
+    }
+}
diff --git a/public/typo3conf/ext/ep_theme/Resources/Private/Templates/Container/Thirds.html b/public/typo3conf/ext/ep_theme/Resources/Private/Templates/Container/Thirds.html
new file mode 100644
index 00000000..b8b67019
--- /dev/null
+++ b/public/typo3conf/ext/ep_theme/Resources/Private/Templates/Container/Thirds.html
@@ -0,0 +1,22 @@
+<html data-namespace-typo3-fluid="true" lang="en"
+      xmlns="http://www.w3.org/1999/xhtml"
+      xmlns:f="http://typo3.org/ns/fluid/ViewHelpers">
+
+<f:layout name="Default"/>
+
+<f:section name="Main">
+    <ep:container data="{data}" cssClasses="py-8">
+        <f:if condition="{data.header_layout} != 100">
+            <f:if condition="{data.header}">
+                <f:render partial="Header/Header" arguments="{header: data.header, subheader: data.subheader, layout: data.header_layout, link: data.header_link}" />
+            </f:if>
+        </f:if>
+        <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-8">
+            <f:for each="{children_300}" as="record">
+                {record.renderedContent -> f:format.raw()}
+            </f:for>
+        </div>
+    </ep:container>
+</f:section>
+
+</html>