This multi-purpose on-the-go mug features the Rambler® Stronghold™ lid, a leak-resistant upgrade backed by dual-slide magnet technology. This lid can be easily rotated and secured for both right and left-handed users, providing strong security between your drink and the outside world. And thanks to the raised handle, you can really enjoy the convenience of the cup holder anywhere. Please note: The Stronghold™ lid is made specifically for the 591 ml Rambler® travel mug. This will not fit other models of Rambler® drinkware. The travel mug's Stronghold™ lid has four placement options and is suitable for both right and left-handers, as are all our Rambler® drinkware. Do not use Rambler® Travel Mugs with Stronghold™ Lid for carbonated beverages or for storing food or perishable items. For more information about product use and safety, please visit our FAQ page.c