YETI Rambler 20 oz Tumbler - 20 oz Capacity and 0.9 lb Weight

YETI Rambler 20 oz Tumbler is a stainless-steel drink container with double-wall vacuum insulation, a magnetic MagSlider lid, and a 20 oz capacity. Its 3.5-inch width and 6.6-inch height give the cup a compact footprint for standard cup holders.

Measured Size and Materials

The tumbler has a 20 oz capacity, weighs 0.9 lb when empty, measures 3.5 inches wide, and stands 6.6 inches high. YETI lists kitchen-grade 18/8 stainless steel, double-wall vacuum insulation, and dishwasher-safe cleaning for the tumbler and lid.

The tapered body is cup-holder compatible, while the stainless-steel construction is designed to resist punctures and rust. REI lists the same 20 fluid-ounce capacity and 18/8 stainless-steel material, along with a BPA-free construction and a cup-holder-compatible shape.

MagSlider Lid and Daily Limits

The included MagSlider lid uses magnets to close the sliding cover and reduce splashing during normal sipping. YETI states that the lid is splash-resistant and dishwasher safe, but its own Rambler FAQ says the tumbler is leak-resistant rather than leakproof.

That distinction matters for transport. The lid can help contain a drink while the tumbler stays upright, but YETI says pressure can release liquid if the cup is tipped over or jostled. A bottle with a sealing lid is the better category match for a bag or other position where spills are unacceptable.

Price and Category Context

YETI lists the Rambler 20 oz Tumbler at $40.00 for the color-matched MagSlider version, while REI lists the 20 fl oz model at $35.00 as of 09/17/2026. The price gap reflects the listed retail offers rather than a change in capacity or basic construction.

The closest comparison is another insulated 20 oz tumbler with a sipping lid. The Rambler's distinguishing specification is its 18/8 stainless-steel body paired with double-wall vacuum insulation and a magnetic splash-resistant cover, while its main limitation is the absence of a leakproof seal.

Best Fit for Upright Sipping

The YETI Rambler 20 oz Tumbler fits users who want a dishwasher-safe, insulated cup for desks, vehicles, and upright carry. Its 20 oz capacity, 0.9 lb empty weight, and cup-holder-compatible dimensions place it between a small coffee cup and a larger 30 oz tumbler.