YETI Rambler 20 oz Tumbler Stainless Steel — Seafoam, Vacuum Insulated with MagSlider Lid

The YETI Rambler 20 oz Tumbler in Seafoam is a stainless-steel, double-wall vacuum insulated cup with a magnetic MagSlider lid designed to keep drinks at their temperature while fitting standard cup holders.

The Rambler 20 oz balances rugged build and everyday convenience. Built from kitchen-grade stainless steel with YETI's double-wall vacuum insulation, it’s meant to hold hot or cold drinks longer than a typical travel cup. The included MagSlider lid uses magnets to provide a simple, splash-resistant barrier; it’s designed to reduce heat transfer and make sipping easier, though it’s not fully leakproof. Sized to fit most car cup holders, the Rambler is practical for commuting, outdoor activities, and home use.

How well does the Rambler 20 oz keep drinks hot or cold?

The double-wall vacuum insulation creates a thermal break between the beverage and the exterior, slowing heat flow. This design preserves hot drink warmth and extends cold drink chill compared to single-wall tumblers. Performance varies with ambient temperature and initial beverage temperature, but the Rambler reliably improves drink longevity in real-world use.

• Double-wall vacuum insulation reduces heat transfer
• Stainless-steel construction minimizes flavor transfer
• MagSlider lid adds a partial barrier to slow temperature escape
• Works best when preheated or pre-chilled for maximum duration

Is the MagSlider lid leakproof and easy to clean?

The MagSlider lid uses a magnetic slider that helps keep the opening covered, decreasing spills and limiting heat loss during sipping. It's splash-resistant but not fully leakproof—tilting or dropping can still cause spills. The lid disassembles easily for rinsing, and the stainless-steel tumbler is dishwasher-safe for convenient cleaning.

• Magnetic slider reduces splashes but isn’t sealed against leaks
• Simple parts allow quick rinsing or dishwasher cleaning
• Removable gasket components for thorough maintenance
• Durable materials resist staining and odors

Will this fit in my car cup holder and everyday routines?

The Rambler 20 oz is engineered with standard dimensions—6 7/8 inches tall and a 3 1/2-inch lip diameter—so it’s compatible with most vehicle cup holders and many office or home organizers. Its streamlined profile makes it practical for hand-held carry, backpacks, and cup-holder mounts, while the powder-coated Seafoam finish adds grip and resists scratching.

• 6 7/8 inches tall, 3 1/2-inch lip diameter for standard holders
• Powder coat finish increases grip and wear resistance
• Sturdy base remains stable in most cup holders
• Compact enough for commuting and outdoor gear pockets

What materials and care instructions should I know?

The Rambler is made from 18/8 stainless steel and features a BPA-free MagSlider lid. This combination stands up to daily use and avoids flavor retention. For best results, hand wash the lid components and place the tumbler on the top rack of the dishwasher if needed; remove and rinse the slider and gasket regularly to maintain performance.

• 18/8 stainless steel body resists rust and dents
• BPA-free MagSlider lid with magnetic closure
• Top-rack dishwasher safe for the tumbler; hand wash lid parts
• Periodic gasket cleaning prevents build-up and maintains function

Who is this for? The YETI Rambler 20 oz in Seafoam suits people who want durable, temperature-retaining drinkware for daily life—commuters, outdoor enthusiasts, parents, and anyone who needs a reliable cup that fits car holders and stands up to rough handling. It’s ideal for those who value a sturdy stainless-steel build, easy maintenance, and the convenience of a magnetic lid for everyday sipping, without requiring a fully leakproof solution.