diff --git a/barker/barker/routers/voucher/save.py b/barker/barker/routers/voucher/save.py
index bb864f7..88de77b 100644
--- a/barker/barker/routers/voucher/save.py
+++ b/barker/barker/routers/voucher/save.py
@@ -92,9 +92,12 @@ def do_save(
         user.id_,
     )
     db.add(item)
+    for dk in data.kots:
+        # Filter out nil inventories
+        dk.inventories = [dki for dki in dk.inventories if round(dki.quantity, 2) != 0]
+    # Filter out nil kots
+    data.kots = [k for k in data.kots if len(k.inventories) > 0]
     for k in data.kots:
-        if not len(k.inventories):
-            continue
         if not happy_hour_items_balanced(k.inventories):
             raise HTTPException(
                 status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,