diff --git a/libpaket/src/utils.rs b/libpaket/src/utils.rs
index 632a23b..7f0d9b8 100644
--- a/libpaket/src/utils.rs
+++ b/libpaket/src/utils.rs
@@ -26,6 +26,13 @@ impl CookieHeaderValueBuilder {
         self
     }
 
+    pub fn add_key_value(mut self, key: String, value: String) -> Self {
+        self.list
+            .push((key, value));
+
+        self
+    }
+
     pub fn build_string(self) -> String {
         let name_value = self
             .list