diff --git a/5-UsefulConceptsAndSTL/3-Containers.ipynb b/5-UsefulConceptsAndSTL/3-Containers.ipynb
index e359685baf9a1828669694a7dbc8fc00df856ab4..c95b2c5812591576cc3ef679f0a675e1b10e3a77 100644
--- a/5-UsefulConceptsAndSTL/3-Containers.ipynb
+++ b/5-UsefulConceptsAndSTL/3-Containers.ipynb
@@ -713,10 +713,32 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
+    "## Access a container element - Python like syntax"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#include <iostream>\n",
+    "#include <vector>\n",
     "\n",
-    "\n",
-    "\n",
-    "\n",
+    "std::vector<int> v {1, // can be accessed with begin()[0] or end()[-4]\n",
+    "                    2, // can be accessed with begin()[1] or end()[-3]\n",
+    "                    3, // can be accessed with begin()[2] or end()[-2]\n",
+    "                    4  // can be accessed with begin()[3] or end()[-1]\n",
+    "                    };\n",
+    "std::cout << v.end()[-2] << \" - \" << v.begin()[1] << std::endl;\n",
+    "// Displays '3 - 2'\n",
+    "// But also some weird pointer value (something like @0x7ffff91e0de0) with Xeus-cling. Just forget about it, it looks like a Xeus-cling bug."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
     "## Other containers\n",
     "\n",
     "`std::vector` is not the only possible choice; I will present very briefly the other possibilities here:\n",