With only a slight difference in temperature retention during testing, we don't feel one cup reigns far superior. If you're looking for a reputable tumbler to keep your drink's temperature at bay, both will do a great job. If you're looking for a larger option, turn to the Stanley.

The 20-ounce Rambler also manages to be slender enough to fit in every cupholder we've tried, plus it can be cleaned by hand with a sponge. Given all that, it's easy to see why the Yeti Rambler has such devotees.

If you want the most leak resistance, we suggest a Rambler® Bottle or Rambler® Jug. Even with a MagSlider™ Lid, the Rambler® Tumblers are leak-resistant, not leakproof.