diff --git a/app/FlashMessage.php b/app/FlashMessage.php
new file mode 100644
index 0000000..35eaf99
--- /dev/null
+++ b/app/FlashMessage.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace App;
+
+use Illuminate\Database\Eloquent\Model;
+
+class FlashMessage extends Model
+{
+    const PRIMARY = 'primary';
+    const DANGER = 'danger';
+}
diff --git a/app/Http/Controllers/Auth/RegisterController.php b/app/Http/Controllers/Auth/RegisterController.php
index 4247b2d..482ef14 100644
--- a/app/Http/Controllers/Auth/RegisterController.php
+++ b/app/Http/Controllers/Auth/RegisterController.php
@@ -8,6 +8,7 @@ use App\Http\Controllers\Controller;
 use Illuminate\Support\Facades\Hash;
 use Illuminate\Support\Facades\Validator;
 use Illuminate\Foundation\Auth\RegistersUsers;
+use App\FlashMessage;
 
 class RegisterController extends Controller
 {
@@ -72,7 +73,7 @@ class RegisterController extends Controller
 
         \Mail::to($user)->send(new Welcome($user));
 
-        session()->flash('primary', 'Thanks for registering. Please, do not forget to validate your e-mail address.');
+        session()->flash(FlashMessage::PRIMARY, 'Thanks for registering. Please, do not forget to validate your e-mail address.');
 
         return $user;
     }
diff --git a/app/Http/Controllers/ItemController.php b/app/Http/Controllers/ItemController.php
index 979c8f0..4867ee0 100644
--- a/app/Http/Controllers/ItemController.php
+++ b/app/Http/Controllers/ItemController.php
@@ -5,13 +5,17 @@ namespace App\Http\Controllers;
 use \App\Item;
 use \App\User;
 use Illuminate\Http\Request;
+use App\FlashMessage as flash;
 
 class ItemController extends Controller
 {
     public function show($id)
     {
         $item = Item::find($id);
-        if (!$item || $item->product->user_id != \Auth::id()) return back();
+        if (!$item || $item->product->user_id != \Auth::id()) {
+            session()->flash(flash::DANGER, "The item doesn't exist.");
+            return back();
+        }
         $users = $item->users()->get();
 
         $otherItems = Item::where([['product_id', $item->product_id], ['id', '!=', $id]])->get();
@@ -28,7 +32,7 @@ class ItemController extends Controller
      * Stores the included item into database
      * As the items are included on the Product view,
      * it must return to there after inclusion
-     * 
+     *
      * @return (view) The product view
      */
     public function store(Request $request)
@@ -43,7 +47,7 @@ class ItemController extends Controller
         $authUser = User::loggedIn();
         $authUser->items()->create(['name' => request('item'), 'product_id' => request('product_id')]);
 
-        return redirect('product/'.request('product_id'));
+        return redirect('product/' . request('product_id'));
     }
 
     public function patch(Request $request)
@@ -52,7 +56,7 @@ class ItemController extends Controller
         $item = User::loggedIn()->items()->find(request('item'));
         $item->name = request('name');
         $item->save();
-        return redirect('item/'.request('item'));
+        return redirect('item/' . request('item'));
     }
 
     public function delete(Request $request)
@@ -65,4 +69,4 @@ class ItemController extends Controller
         Item::deleteAndDetach($item);
         return redirect('product/' . $product);
     }
-}
\ No newline at end of file
+}
diff --git a/app/Http/Controllers/ProductController.php b/app/Http/Controllers/ProductController.php
index 81da593..849fa7b 100644
--- a/app/Http/Controllers/ProductController.php
+++ b/app/Http/Controllers/ProductController.php
@@ -6,6 +6,7 @@ use \App\Item;
 use \App\User;
 use \App\Product;
 use Illuminate\Http\Request;
+use App\FlashMessage as flash;
 
 class ProductController extends Controller
 {
@@ -70,7 +71,7 @@ class ProductController extends Controller
         $product = Product::fromAuthUser()->find($id);
 
         if (!$product) {
-            session()->flash('danger', "The product doesn't exist or doesn't belongs to you.");
+            session()->flash(flash::DANGER, "The product doesn't exist or doesn't belongs to you.");
             return redirect('/product');
         }
         return view('product.show', compact('product'));