YETI Rambler Tumbler with MagSlider Lid (20/30oz)

Name: YETI Rambler Tumbler with MagSlider Lid (20/30oz)
Brand: YETI

Not recommended

A rugged 18/8 steel tumbler, but the MagSlider lid is clear BPA-free Tritan plastic with a plastic magnetic slider - you drink over plastic every sip.

The verdict: Minimal plastic contact

The Rambler tumbler body is heavy-gauge 18/8 stainless steel, but the lid you drink through is plastic. The MagSlider lid is clear BPA-free Tritan, and the magnetic slider that opens and closes the drink hole is a plastic-and-magnet piece you sip directly over. With the lid on - which is how these are used - your mouth and drink pass over plastic on every sip. Included as a corrective: the premium steel reputation leads buyers to assume the whole thing is steel, but the drink-contact lid is Tritan.

Verification: Manufacturer confirmed · Last reviewed July 6, 2026

Lead safety: Lead found, not in contact path

Independent XRF testing of a YETI Rambler 20oz Tumbler (the same model and double-wall vacuum-insulated construction as this MagSlider tumbler) found the body itself lead-free, but a lead-based sealing dot under the stainless bottom cap - used to seal the vacuum layer, a construction method common across insulated steel drinkware. The dot is encapsulated under the base and not in the drink path, but is a real concern if that base coating wears or chips.

Verification: Community reported

lab-test https://tamararubin.com/2018/12/pink-yeti-rambler-20-oz-tumbler-lead-free-in-all-accessible-components/
XRF test of a Pink YETI Rambler 20oz Tumbler - lead-free in accessible components, leaded sealing dot under the bottom cap
lab-test https://tamararubin.com/2020/07/this-is-what-a-leaded-sealing-dot-looks-like-on-a-stainless-steel-water-bottle-please-read-the-full-post-if-you-have-questions/
explains the leaded sealing dot construction common to insulated stainless bottles

Buy from YETI

What it's made of

Part	Material	Food contact
tumbler body (double-wall insulated) kitchen-grade 18/8 stainless steel body and rim	Stainless Steel 304 / 18-8	Yes primary
MagSlider lid clear BPA-free Tritan lid; you drink over it	Tritan copolyester	Yes primary
magnetic slider plastic slider with an embedded magnet; covers the drink hole you sip over	Plastic other / unspecified	Yes primary

The YETI Rambler tumbler is a tank - thick 18/8 stainless steel that holds temperature and shrugs off abuse. Its signature MagSlider lid uses a magnetic slider to cap the drink hole; it's spill-resistant rather than leakproof, and the magnet pops out for cleaning. You can drink lidless over the bare steel rim, but the tumbler is built around drinking through the lid. Sold in 20 and 30 oz.

Pros

Extremely durable 18/8 stainless steel body; bare steel rim if used lidless
Lid material is labeled BPA-free (Tritan) and the magnet pops out to clean

Cons

No steel or ceramic drink-contact lid option for this tumbler
MagSlider is spill-resistant, not leakproof

Notes

Drinking lidless puts your lips on the steel rim, but the lid as sold is plastic

Categories: Travel Mugs & Tumblers

Sources

Every material claim above is backed by these. This is the scattered info we centralized.

manufacturer https://www.yeti.com/drinkware/drinkware-accessories/rambler-magslider-lid.html
MagSlider lid is BPA-free with a removable magnetic slider; spill-resistant, not leakproof
review https://killingworthtruevalue.com/p/yeti-rambler-clear-tritan-tumbler-lid-bpa-free-888830043837
retailer listing identifies the clear MagSlider lid material as Tritan, BPA-free

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