diff --git a/docker_run.sh b/docker_run.sh
index d34a3e8..72a6539 100755
--- a/docker_run.sh
+++ b/docker_run.sh
@@ -13,6 +13,16 @@ if [ "$UPGRADE_DB" = "true" ]; then
   pipenv run flask db upgrade
 fi
 
+if [ "$RESET_DB" = "true" ]; then
+  echo 'Clearing database and loading example data...'
+  pipenv run flask load-example-data
+fi
+
+if [ "$LOAD_EXAMPLE_SPONSORS" = "true" ]; then
+  echo 'Loading example data...'
+  pipenv run flask load-example-sponsors
+fi
+
 if [ "$APPLICATION_ROOT" = "/" ]; then
   pipenv run gunicorn --bind 0.0.0.0:$PORT0 wsgi:app
 else
diff --git a/example_data.py b/example_data.py
index f9b4664..b81cf4f 100644
--- a/example_data.py
+++ b/example_data.py
@@ -34,9 +34,14 @@ class ExampleDataLoader:
                     # row[3]: SP_TYPE
                     first_line = False
                 elif int(row[0] or -1) != -1:
-                    new_sponsor = Sponsor(SPONSOR_ID=int(row[0]), SP_NAME=row[1], SP_MAILING_ADDRESS=row[2], SP_TYPE=row[3])
-                    new_sponsor.SP_TYPE_GROUP_NAME = Sponsor.get_type_group_name(new_sponsor.SP_TYPE)
-                    sponsors.append(new_sponsor)
+                    sponsor_id = int(row[0])
+                    is_duplicate = session.query(Sponsor).filter(Sponsor.SPONSOR_ID == sponsor_id).count() > 0
+
+                    # Make sure we're not creating duplicates
+                    if not is_duplicate:
+                        new_sponsor = Sponsor(SPONSOR_ID=sponsor_id, SP_NAME=row[1], SP_MAILING_ADDRESS=row[2], SP_TYPE=row[3])
+                        new_sponsor.SP_TYPE_GROUP_NAME = Sponsor.get_type_group_name(new_sponsor.SP_TYPE)
+                        sponsors.append(new_sponsor)
 
             session.add_all(sponsors)
             session.commit()
diff --git a/pb/__init__.py b/pb/__init__.py
index 130b432..34f2685 100644
--- a/pb/__init__.py
+++ b/pb/__init__.py
@@ -403,6 +403,7 @@ def _update_study(study, form):
 
         study.STUDYID = max_id + 1
     else:
+        # Delete existing required documents for this study.
         db.session.query(RequiredDocument).filter(RequiredDocument.STUDYID == study.STUDYID).delete()
 
     study.TITLE = form.TITLE.data
diff --git a/tests/test_sanity.py b/tests/test_sanity.py
index f0602d9..c5e51f5 100644
--- a/tests/test_sanity.py
+++ b/tests/test_sanity.py
@@ -85,6 +85,12 @@ class Sanity_Check_Test(unittest.TestCase):
         self.assertEqual(num_docs_before, num_docs_after)
         self.assertEqual(num_studies_before, num_studies_after)
 
+    def test_add_sponsors(self):
+        """Load sponsors twice in a row to make sure duplicates aren't created."""
+        self.load_sponsors()
+        self.load_sponsors()
+
+
     def test_add_and_edit_study_sponsor(self):
         """Add and edit a study sponsor"""
         num_sponsors = 5