diff --git a/src/CookieInterface.php b/src/CookieInterface.php
new file mode 100644
index 0000000..8b9e84b
--- /dev/null
+++ b/src/CookieInterface.php
@@ -0,0 +1,30 @@
+<?php
+namespace Fig\Http\Message;
+
+/**
+ * Cookie Implementation Interface
+ */
+interface CookieInterface
+{
+    /**
+     * Creates an instance of a class with the given parameters.
+     * @link  http://php.net/manual/en/function.setcookie.php
+     * @param string $name
+     * @param string $value
+     * @param string $expire
+     * @param string $path
+     * @param string $domain
+     */
+    public function __construct(
+        string $name,
+        string $value = null,
+        string $expire = 0,
+        string $path = '/', 
+        string $domain = null
+    );
+    /**
+     * Returns a cookie string for headers
+     * @return string
+     */
+    public function __toString();
+}