YETI Rambler 20 oz Tumbler Review: Would Owners Buy It Again?
Disclosure: As an Amazon Associate I earn from qualifying purchases. If you buy through links on this page we may earn a commission at no extra cost to you. How this review was made: We did not test this tumbler in person. This verdict is based on our analysis of long-term use reports, independent tests and retailer ratings, all listed at the end of this article. Our method.
A durable everyday tumbler, as long as you accept the lid
REI shoppers give the 20 oz Rambler with MagSlider lid 4.7 out of 5 across more than 55,000 reviews, with 93% recommending it. A years-of-daily-use report found the body took several drops with only small dents and the finish held up. The common complaint is the lid. It resists splashes but isn't leakproof, and the area under the slider is hard to clean. One test also found its cold retention merely average.
Check current price on Amazon → Prices and availability change often, so we don't list them here.Buy it again if you…
- want a sturdy insulated cup for the desk, car or couch
- like one-handed sipping with a slide-to-open lid
- want a product with a long warranty
Skip it if you…
- need a lid that survives being tossed in a bag
- want the longest possible ice retention
- dislike fiddly lid parts to clean
The YETI Rambler 20 oz is a double-wall, vacuum-insulated stainless steel tumbler with a magnetic MagSlider lid you slide open to sip. It's dishwasher safe and comes in many colors.
We looked at long-term use and independent tests to see how the body, finish and lid hold up.
What owners say, at a glance
Bars show our editorial summary of how consistently owners praise or complain about each area across all sources — not a lab measurement.
The key specs
| Capacity | 20 fl oz |
|---|---|
| Weight | 12.7 oz empty (REI) |
| Material | 18/8 stainless steel with a DuraCoat finish |
| Lid | MagSlider, splash-resistant, not leakproof |
| Cleaning | Dishwasher safe |
| Warranty | 5 years (per Hiking Insights) |
What owners love
What owners complain about
How it holds up over time
The steel body is the strong point. Long-term owners describe dents rather than failures, and the finish mostly survives daily use. The weak link is the lid, where the slider can get stiff or gunky, and replacement lids are sold separately if yours wears out.
Tips from owners
- Don't toss it in a bag with liquid inside unless you swap in a sealed lid.
- Take the lid apart and clean under the slider regularly.
- Pre-chill or pre-warm it with water for better retention.
- Check your car's cup holder if it's a narrow one.
Pros and cons
What owners love
- Very durable body and finish
- Keeps drinks cold or hot for hours
- One-handed MagSlider lid
- Dishwasher safe, fits most cup holders
What owners complain about
- Lid is splash-resistant, not leakproof
- Hard to clean around the slider
- Premium-priced
- Finish can chip for some owners
Other options owners compare
These are the insulated cups and bottles most often compared with the Rambler.
| Model | Style | Consider it if… | |
|---|---|---|---|
| YETI Rambler 20 oz Tumbler (this review) | Slide-open tumbler | You want a rugged everyday cup | See on Amazon |
| Hydro Flask 20 oz All Around Tumbler | Press-in lid tumbler | You want a similar tumbler from another trusted brand | See on Amazon |
| Owala FreeSip 24 oz | Sip-or-swig bottle | You want a bottle with a locking lid | See on Amazon |
Want a tumbler built to last years?
Check the current price and colors on Amazon.
Frequently asked questions
Is the YETI Rambler 20 oz leakproof?
No. The MagSlider lid is splash-resistant, not leakproof, so it can leak if tipped or dropped.
Is it dishwasher safe?
Yes, though the area under the slider may need hand-washing.
How heavy is it?
About 12.7 ounces empty, per REI.
Does it fit in a cup holder?
It fits most, but one reviewer found it too large for many car cup holders, so check yours.
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Sources we analyzed
- Hiking Insights: YETI Rambler 20 oz after years of use — durability, finish, warranty and cleaning
- REI: YETI Rambler Tumbler with MagSlider Lid, 20 fl. oz. — rating, recommend rate, weight and review themes
- Taste of Home: Yeti Rambler tumbler review — temperature test results and lid notes
- Walmart: YETI Rambler 20 oz listing — dimensions and shopper themes
Figures reflect each source as of October 06, 2026 and may change. We summarize owner feedback in our own words and do not reproduce retailer reviews.