diff --git a/src/Interfaces/Buyable.php b/src/Interfaces/Buyable.php
index c5da89a7..d25f2b6e 100644
--- a/src/Interfaces/Buyable.php
+++ b/src/Interfaces/Buyable.php
@@ -6,6 +6,11 @@
 
 interface Buyable
 {
+    /**
+     * Determine whether the buyable object is available for the itemable instance.
+     */
+    public function buyable(Itemable $itemable): bool;
+
     /**
      * Get the item representation of the buyable instance.
      */
diff --git a/src/Models/Variant.php b/src/Models/Variant.php
index b779a2e7..1d0c1ceb 100644
--- a/src/Models/Variant.php
+++ b/src/Models/Variant.php
@@ -111,6 +111,14 @@ protected function alias(): Attribute
         );
     }
 
+    /**
+     * Determine whether the buyable object is available for the itemable instance.
+     */
+    public function buyable(Itemable $itemable): bool
+    {
+        return true;
+    }
+
     /**
      * Get the price by the given type and currency.
      */