YETI Rambler 20 oz Tumbler
Top PickWhat We Like
- 20 ounces that still fit a cup holder
- Body and lid are dishwasher safe
- MagSlider lid comes apart to clean
- Holds heat and keeps ice for hours
Worth Noting
- MagSlider lid isn't leakproof
- Costs more than any other mug here
- Lid
- MagSlider, not leakproof
- Care
- Dishwasher safe
- Capacity
- 20 oz
- Cupholder Fit
- Standard cup holders
Read the full review
Twenty ounces is the figure that makes this the default. It is a full mug of coffee with room left for cream, and it still drops into a standard cup holder — rarer than it sounds, because tumblers this size usually grow wide enough to foul the holder. It stands 6.6 inches tall with a 3.5-inch base, and that base measurement is the one to check against your car before you order.
We think it is the best all-round mug in this group for desk and car drinkers. The vacuum wall does what the marketing promises: coffee stays hot long enough that you notice, iced drinks keep their ice through an afternoon, and the outside never sweats onto your desk. Body and lid both go in the dishwasher, which over a few years matters more than any single specification. The MagSlider top slides with a thumb, comes apart for a proper rinse, and the coated finish resists the chips that plain steel collects.
The one thing it will not do is travel in a bag. YETI says plainly that the MagSlider lid is not leakproof, and that matches what we found — knocked over on a desk it holds, tipped on its side in a tote it does not. Buy it for a table, a car seat or a porch step and the limitation never comes up.
Set against the Contigo West Loop, the Rambler trades a sealed valve for capacity, color choice and a lid you can dismantle at the sink. What is left is the price: this is the most expensive mug here, and for coffee you sip slowly across a morning, it is the one that earns the difference.
Bottom line: We recommend the Rambler to anyone whose coffee stays at a desk or in a cup holder: 20 ounces, dishwasher-safe, and still hot at the last sip — it just isn't a bag mug.