diff --git a/tienda_ilusion/don_confiao/migrations/0041_product_external_id.py b/tienda_ilusion/don_confiao/migrations/0041_product_external_id.py
new file mode 100644
index 0000000..e43910c
--- /dev/null
+++ b/tienda_ilusion/don_confiao/migrations/0041_product_external_id.py
@@ -0,0 +1,18 @@
+# Generated by Django 5.0.6 on 2025-07-19 22:32
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('don_confiao', '0040_customer_external_id'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='product',
+            name='external_id',
+            field=models.CharField(blank=True, max_length=100, null=True),
+        ),
+    ]
diff --git a/tienda_ilusion/don_confiao/models.py b/tienda_ilusion/don_confiao/models.py
index 180e3af..22dbcef 100644
--- a/tienda_ilusion/don_confiao/models.py
+++ b/tienda_ilusion/don_confiao/models.py
@@ -43,6 +43,7 @@ class Product(models.Model):
         default=MeasuringUnits.UNIT
     )
     categories = models.ManyToManyField(ProductCategory)
+    external_id = models.CharField(max_length=100, null=True, blank=True)
 
     def __str__(self):
         return self.name
diff --git a/tienda_ilusion/don_confiao/tests/test_products.py b/tienda_ilusion/don_confiao/tests/test_products.py
index 0c12f74..6104a74 100644
--- a/tienda_ilusion/don_confiao/tests/test_products.py
+++ b/tienda_ilusion/don_confiao/tests/test_products.py
@@ -10,6 +10,15 @@ class TestProducts(TestCase):
     def setUp(self):
         self.client = Client()
 
+    def test_create_product(self):
+        product = Product()
+        product.name = "Un producto"
+        product.price = 1000
+        product.save()
+
+        self.assertIsInstance(product, Product)
+        self.assertIsNone(product.external_id)
+
     def test_import_products(self):
         self._import_csv()
         all_products = self._get_products()