This ultra-tough YETI Rambler Travel Mug is the only YETI drinkware with the StrongHold Lid. The StrongHold is a leak-resistant, twist-on upgrade that lets you take your drink anywhere without worrying about spills. It's backed with dual-slider magnet technology to add a strong extra layer between your drink and the great outdoors. The elevated handle fits right into your cup holder, so you can take it out on early morning fishing trips or outdoor adventures. An ultra-tough mug that's built for the wild. Note: The StrongHold is designed for the 591ml YETI Rambler Travel Mug and won't fit other Rambler Drinkware models.