If you’re not lid shopping for your Rambler® 591 mL / 20 oz Travel Mug, we’d quit readin’ here. The Rambler® Stronghold™ Lid is exclusive to our travel mug and won’t play nice with any other drinkware. But if you’re topping your YETI® Travel Mug —read on. This leak-resistant, twist-on, twist-off lid is backed with dual-slider magnet technology to add a strong layer between your free-flowing drink and the outside world. Please Note: This lid is specially made for the Rambler® 591 mL Travel Mug and won’t fit other Rambler® Drinkware models. Size:  887 ml / 30 oz