YETI Rambler Lid Replacement: Which One Fits

Answer one question before you look at a single listing: is your vessel a bottle, a tumbler or cup, or a Travel Mug?

• Bottle? Buy on style, not size. All Rambler bottles share a thread, so any bottle cap fits any bottle. Pick chug, straw or carry, and ignore the ounce.
• Tumbler or cup? Buy the MagSlider size. Medium fits the 20 oz Tumbler and the small cups and mugs; Large fits the 30 oz Tumbler and the straw mugs; Small fits the 6 oz Espresso, the 8 oz Stackable and the 10 oz Wine Tumbler.
• Mind the 20 oz trap. A "20 oz Tumbler" lid, a "20 oz Rambler" bottle cap and a "20 oz Travel Mug" Stronghold lid are three different parts. One of the listings below spells this out in its own title.
• A four-brand title is a diameter, not a fit. A 30 oz tumbler mouth is a 3.6 in circle whether YETI, RTIC, Ozark Trail or Ember made it, so a lid lists them all. Match the diameter and the brand list stops mattering.
• The reviews are shared. The high rating counts here are pooled across the colour and size variants of a family, not earned by the single size you are buying. Read them as a family verdict.
• A MagSlider is spill-resistant, not leakproof. YETI says so itself, and owners confirm it. If you need leakproof, that is the Stronghold or a screw cap, not the MagSlider.

The single most common mistake on the tumbler side is buying a MagSlider by the number on the vessel instead of the size YETI assigns it. The three sizes, read straight off YETI's own fit lists:

• Small fits the 6 oz Espresso Mug, the 8 oz Stackable Cup, and the 10 oz Wine Tumbler and 10 oz Tumbler.
• Medium fits the 10 oz Stackable Lowball, 10 oz Stackable Mug, 16 oz Stackable Cup, 20 oz Stackable Cup, 20 oz Tumbler, 24 oz Mug and 25 oz Straw Mug.
• Large fits the 14 oz Stackable Mug, 30 oz Stackable Cup, 30 oz Tumbler, 35 oz Straw Mug and 42 oz Straw Mug.

YETI states, in the same breath, that this lid "is not compatible with Rambler Bottles or Jugs or Travel Mugs with the Stronghold Lid." So the MagSlider is the tumbler-and-cup answer and nothing else. If your vessel is a bottle, skip this whole section and buy a cap.

The part people most often mistake for a MagSlider is the Stronghold lid, which YETI designed for the 20 oz and 30 oz Travel Mugs. It twists on and locks, it is a different part, and r/YetiCoolers has a standing question about whether the pieces interchange: "Do Regular Magslider Pieces Work On Stronghold Lids?" They do not.

This is also the one lid in the line with a recall, and it is worth stating correctly because the internet gets it wrong. In November 2020 YETI recalled the Rambler 20 oz Travel Mug with the Stronghold Lid (CPSC 21-020) because, in the notice's words, "the magnet slider on the lid can eject and hot contents can spill out." It is the 2020 Travel Mug Stronghold lid, not a MagSlider, and not a 2023 event: the 2023 YETI recall was for soft coolers and gear cases, with no drinkware in it. If you own a 20 oz Travel Mug from that period, the recall record is the link to check.

If what you lost was the little magnet out of a MagSlider rather than the whole lid, you are not alone. One owner opened a gift and found "there is no magnetic slider for my Yeti", and the slider is sold on its own. If your lid is fine and you just want to drink through a straw, that is the straw lids and straw caps guide, where the bottle-versus-tumbler split works exactly the same way.

And if you came here wanting the one table that shows every lid against every vessel, that is the Rambler accessories hub, which is the chart YETI has never published and owners keep asking for.