Drinkware / Guide
How to clean a tumbler lid, straw and gasket, and when to stop cleaning and replace the gasket
The steel never gets dirty in a way that matters. The lid does: the gasket channel, the straw, the slider track. The makers' own care lines, the dishwasher rules by brand, and the two parts you replace instead.
By Mike M.Updated Researched · every figure sourced
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What the makers say
The dishwasher question has its own page, because the instruction differs by brand and sometimes by part: are tumblers dishwasher safe quotes every maker on this site, including the two that ask you to hand-wash the cup, and explains why washing against the instruction can cost you the one failure the warranty covers.
Stanley (Quencher H2.0 40 oz): “Dishwasher safe.” Stanley (IceFlow 30, ProTour 40): “Dishwasher safe. Not for use with hot liquids, in the microwave or freezer, or on the stovetop.” YETI (Rambler 30, via L.L.Bean): “Dishwasher safe,” lid included; GOHUNT's listing adds that the MagSlider is dishwasher safe. Simple Modern (Trek and Classic): “Disassemble tumbler, lid and straw before placing in dishwasher.” RTIC (Road Trip): “Dishwasher Safe makes it easy to clean, remember to place the lid and straw on top rack only.” RTIC (Outback): “place the lid on the top rack only.” Owala (FreeSip): “Dishwasher-safe lid and hand-washable cup.” Purist (Mover, no longer stocked on Amazon): “Not dishwasher safe. Only top that is dishwasher safe is Scope.” Klean Kanteen and Zojirushi: not stated on the pages we read; hand wash until you find the line.
The routine
- Every day: rinse the lid under hot water, straw out, slider open. Coffee oil and sugar are what feed the smell.
- Every few days: disassemble. Pull the straw, pop the flip or slider if it comes off (Stanley's FlowState cover and ProTour spout do; YETI's MagSlider magnet lifts out), and work the gasket out of its channel with a fingernail or a plastic pick, never a knife.
- Wash the pieces in hot water and dish soap with a bottle brush for the body, a straw brush for the straw, and a soft toothbrush for the gasket channel, where the lid meets the threads.
- Or the top rack, disassembled, where the maker allows it. A gasket left in its channel in a dishwasher comes out clean on the outside and not on the inside.
- Dry apart. A gasket reseated wet is a gasket growing something.
Mold and the gasket
Straws and sliders
Straws grow film inside faster than anything else on a tumbler. A straw brush (most makers ship one; Stanley's and Simple Modern's include reusable straws) every few days, and a hot soapy soak weekly. Stanley and Simple Modern sell replacement straws; RTIC ships two with the Road Trip. Sliders: YETI's MagSlider lifts off the lid for washing and its track collects grit; wipe the track dry before you reseat it or the magnet drags. Stanley's FlowState cover rotates off; wash the three positions' seal edge.
When to replace, not clean
A gasket that is cracked, hard, or permanently discolored. A straw that has split. A flip hinge that no longer snaps. A slider magnet that is lost. Every one is a part, and which makers sell it is the whole reason this site ranks drinkware the way it does: Klean Kanteen sells a gasket kit for every TKWide cap; Stanley sells lids, straws and toppers in a Lids collection and excludes them from its lifetime term; YETI sells every Rambler lid; Simple Modern sells lid accessories and covers broken lids under its term; RTIC lists nothing. Tumbler lid replacement has the full list.
Our picks for this
The two replacement parts this page is really about
One gasket kit, one lid. Only if cleaning has stopped working.
Bottle gasket replacement
Klean Kanteen Café Cap 2.0 Maintenance Kit
Lifetime warranty9.5/10Klean Kanteen's own seal kit for the Café Cap 2.0, on the same lifetime limited warranty. The TKWide gasket kit is sold on kleankanteen.com, not on Amazon.
$19.99Amazon#ad · Price as of November 5, 2026 · Disclosure for the link to Klean Kanteen Café Cap 2.0 Maintenance Kit
Stanley 40 oz lid replacement
BOTTLAN Replacement Lid for Stanley Quencher H2.0 40 oz (2-pack)
Warranty: unverified9.1/10An aftermarket 2-pack for the 40 oz Quencher H2.0; Stanley sells its own lids on stanley1913.com, not on Amazon. Lids are excluded from its lifetime term either way.
$9.99Amazon#ad · Price as of November 5, 2026 · Disclosure for the link to BOTTLAN Replacement Lid for Stanley Quencher H2.0 40 oz (2-pack)
The cooler version of this page is how to clean a soft cooler.
How we scored this
What we checked before picking
Every pick on this page is built from documents you can open yourself: the maker's published capacity, insulation, dimensions and weight; the warranty term quoted from the maker's own warranty page with the date we read it; the parts catalogue, to confirm the latches, gaskets, plugs, lids and straws can actually be bought; and the third-party ice-retention tests that measured these models (OutdoorGearLab, Outdoor Life, Treeline, Outside, Gear Patrol), credited to the publisher that ran them. Every figure links to where it came from, so you can check the pick before you buy it.
Scores run from 8.4 to 10: 9.5–9.8 is category-defining, 9.0–9.4 outstanding, and 8.4–8.9 excellent and strongly recommended. Nothing below 8.4 is listed here — a product that cannot earn 8.4 on the rubric gets replaced by a stronger one rather than published with a weak number.
Scores are editorial judgments built from that documented research. Commissions never set a score or decide a pick. The rubric and its weights are published.
Questions
Frequently asked
How do you clean mold out of a tumbler lid?
Disassemble, pull the gasket, soak the lid parts in warm water and baking soda for twenty minutes, scrub the gasket channel with a toothbrush, rinse and dry apart. If the gasket itself stays black or has cracked, replace it.
Can you put a Stanley lid in the dishwasher?
Yes; Stanley says the Quencher, IceFlow and ProTour are dishwasher safe. Simple Modern and RTIC say to disassemble first and use the top rack.
Can you put an Owala in the dishwasher?
The lid, yes; the cup, no. Owala's page: “Dishwasher-safe lid and hand-washable cup.”
How do you clean a tumbler straw?
A straw brush every few days and a hot soapy soak weekly. Replace it when it splits; Stanley and Simple Modern sell straws.
Why does my tumbler smell even after washing?
The gasket. Pull it out of the channel; the underside and the channel are where film grows. If it does not clean, replace it.
Keep reading
Related on Chill & Chest
Receipts
Sources
- Stanley 1913 — Quencher H2.0 FlowState Tumbler 40 oz product page (read 2026-09-21)
- Stanley 1913 — IceFlow Flip Straw Tumbler 30 oz product page (read 2026-09-21)
- Stanley 1913 — Quencher ProTour Flip Straw Tumbler 40 oz product page (read 2026-09-21)
- Stanley 1913 — Lids collection (replacement lids, straws and toppers) (read 2026-09-21)
- Stanley 1913 — Product Warranty (read 2026-09-21)
- L.L.Bean (authorized YETI dealer) — YETI Rambler 30 oz Tumbler with MagSlider Lid (read 2026-09-21)
- GOHUNT (YETI retailer) — YETI Rambler 30 oz Tumbler listing (read 2026-09-21)
- Simple Modern — Trek Tumbler 40 oz product page (read 2026-09-21)
- Simple Modern — Classic Tumbler 24 oz product page (read 2026-09-21)
- RTIC — Road Trip Tumbler product page (read 2026-09-21)
- RTIC — Outback Bottle product page (read 2026-09-21)
- Owala — FreeSip product page (read 2026-09-21)
- Purist — Mover 18 oz product page (read 2026-09-21)
- Klean Kanteen — TKWide Gasket Kit (read 2026-09-21)
Specs come from the maker's own product pages (linked on every product), warranty terms from the maker's warranty page with the date we read it, and ice-retention measurements are attributed to whoever measured them. Prices are the live Amazon price with the date they were last checked. Where a figure isn't published anywhere, the page says so. Read the full method.