Yeti Rambler Replacement StrongHold Lid. Travel Mugs the lid twists on securely and uses dual-slider magnet technology to help keep leaks and splashes contained. To sip simply push the magnet down and slide. When you're done slide it forward. And when it's time for a cleaning just pull the magnets apart and let the dishwasher do the work. Do not use the Rambler StrongHold Lid with carbonated beverages or for storage of food or perishables. Package Contents: Yeti Rambler Replacement StrongHold Lid Yeti 21070070004: Rambler 30 oz StrongHold Lid 30 oz