We teamed up with YETI to make the Rambler Tumbler for dawn patrols and early drives down to the desert. It keeps our coffee nice and toasty when we drive for hours, and even after skiing most of the morning. We also like that it cleans well enough that we can switch out morning's coffee for evening libations without a roasty aftertaste. The MagSlider Lid is equally impressive with its secure fit and ease-of-use.