Give leaks a run for their money with the Rambler® StrongHold™ Lid. Designed for our 20 oz. and 30 oz. 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.