This page exists because the question gets asked constantly and answered nowhere in a form you can act on. People search whether a Yeti fits a car cup holder and get a review of a cup holder expander, which is a different question.
So here is every published fitment figure we could find in this category, in one place, with the source next to each one. Where a maker publishes nothing, the cell says so rather than being filled in.
Which expander takes which named bottle
| Expander | Accepts bottle | Fits car holder | Named bottles the maker lists |
|---|---|---|---|
| TYKOR wide | 2.7" – 4.2" | Not published | Yeti 24/36/46 oz · Stanley 14–40 oz |
| TYKOR standard | 3" – 3.9" | Not published | Yeti 24/36/46 oz · Owala 12/24/40 oz |
| Amazon Basics | 3.4" – 3.8" | 2.5" – 3.75" | Yeti Rambler 20/26/30 oz · Hydro Flask 32/40 oz |
| Swigzy | 2.8" – 3.85" | 2.6" – 3.8" | Owala · Hydro Flask · Yeti · Nalgene, 32–40 oz |
| Smart Kup | Up to 3.8" | Up to 3.2" | Hydro Flask 32/40 oz · Nalgene · Yeti |
| Generic adjustable | 3.4" – 3.8" | Not published | Hydro Flask 32/40 oz · Yeti 24/36/46 oz |
| JOYTUTUS | Not published | Not published | Yeti · Hydro Flask, 18–40 oz stated |
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | No photoTYKOR Cup Holder Expander, bottles 2.7"–4.2"The widest accepted range on this page — 2.7" to 4.2", 16 to 46 oz — and the only one that names Stanley sizes as well as Yeti. | The widest published range here | Check price on Amazon #ad We show a price only when we can verify one. How we’re funded |
| 2 | No photoAmazon Basics Cup Holder Expander with Adjustable BaseThe only expander here that publishes the car-side figure as well as the bottle-side one: base adjusts 2.5"–3.75", accepts bottles 3.4"–3.8". Both numbers, from the maker. | The only one that publishes BOTH numbers | Check price on Amazon #ad We show a price only when we can verify one. How we’re funded |
| 3 | No photoSwigzy Car Cup Holder ExpanderPublishes both figures too: base adjusts 2.6"–3.8", holds drinks 2.8"–3.85". The widest car-side range on this page. | A wide base range for oversized holders | Check price on Amazon #ad We show a price only when we can verify one. How we’re funded |
| 4 | No photoSmart Kup Cup Holder Expander, bottles to 3.8"Publishes both sides as well, and its car-side figure is the narrow one: fits holders up to 3.2", accepts bottles up to 3.8". | Narrow car cup holders | Check price on Amazon #ad We show a price only when we can verify one. How we’re funded |
| 5 | No photoTYKOR Cup Holder Expander, bottles 3"–3.9"Publishes both the bottle range it accepts (3"–3.9") and the specific tumblers it is cut for — Yeti 24/36/46 oz and Owala 12/24/40 oz. | Yeti and Owala, by name | Check price on Amazon #ad We show a price only when we can verify one. How we’re funded |
| 6 | No photoCup Holder Expander with Adjustable Base, 3.4"–3.8"Accepts bottles 3.4"–3.8" and names Hydro Flask 32/40 oz and Yeti 24/36/46 oz — the same band as the Amazon Basics, from a different maker. | Hydro Flask and Yeti specifically | Check price on Amazon #ad We show a price only when we can verify one. How we’re funded |
| 7 | No photoJOYTUTUS Cup Holder Expander with Rubber BaseAn adjustable rubber base rather than a plastic one — the material choice that decides whether the expander turns in the holder every time you lift the bottle out. | Grip, over range | Check price on Amazon #ad We show a price only when we can verify one. How we’re funded |
#1 · The widest published range here
TYKOR Cup Holder Expander, bottles 2.7"–4.2"
TYKOR
The widest accepted range on this page — 2.7" to 4.2", 16 to 46 oz — and the only one that names Stanley sizes as well as Yeti.
A 1.5" span from 2.7" to 4.2" is genuinely wide, and it is the reason to pick this over the narrower TYKOR: it is the one that still works when you change bottles.
The 40 oz Stanley Quencher is the tumbler that defeats most car cup holders and most expanders. This listing names it and the range covers it.
What works
- Widest published bottle range on this page
- Names Stanley as well as Yeti
- Covers 16 oz to 46 oz
What does not
- Still no published car-side base range
- A wide range means a loose grip at the narrow end
- One unit
Skip this if
Skip it if you only ever carry one size of bottle — a tighter-ranged expander holds it more securely.
Where these numbers came from
We have not handled this product. Here is what we did instead.
#2 · The only one that publishes BOTH numbers
Amazon Basics Cup Holder Expander with Adjustable Base
Amazon Basics
The only expander here that publishes the car-side figure as well as the bottle-side one: base adjusts 2.5"–3.75", accepts bottles 3.4"–3.8". Both numbers, from the maker.
This is the entry that makes the fitment table on this site possible: you can check it against your own cup holder without owning the product.
Measure your cup holder across the top opening. If it is between 2.5" and 3.75" this expander seats. If it is wider — some trucks are — nothing on this page grips it.
The accepted bottle band is narrow (0.4"). It is precise, not versatile: great for a 32 oz Hydro Flask, wrong for a soda can.
What works
- Publishes both the car-side and bottle-side ranges
- Names specific Yeti and Hydro Flask sizes
- Amazon's own line, so returns are frictionless
What does not
- Narrow accepted bottle band
- No good with small cups
- Plain, with no phone or coin extras
Skip this if
Skip it if you carry a 40 oz Stanley — its base is outside the published 3.4"–3.8" band. Buy the wide TYKOR.
Where these numbers came from
We have not handled this product. Here is what we did instead.
#3 · A wide base range for oversized holders
Swigzy Car Cup Holder Expander
Swigzy
Publishes both figures too: base adjusts 2.6"–3.8", holds drinks 2.8"–3.85". The widest car-side range on this page.
A base that expands to 3.8" is the widest here, which matters in trucks and older SUVs where cup holders were sized for a big-gulp cup.
Both numbers published makes this and the Amazon Basics the only two you can check on paper before buying. That is the whole reason both are here.
What works
- Publishes base and bottle ranges
- Widest base expansion here
- Names four bottle brands
What does not
- Bottle range starts at 2.8" — a standard can still rattles
- One unit
- Nothing beyond the expander itself
Skip this if
Skip it if your car cup holder is narrower than 2.6" — the base will not compress that far.
Where these numbers came from
We have not handled this product. Here is what we did instead.
#4 · Narrow car cup holders
Smart Kup Cup Holder Expander, bottles to 3.8"
Smart Kup
Publishes both sides as well, and its car-side figure is the narrow one: fits holders up to 3.2", accepts bottles up to 3.8".
A 3.2" car-side maximum is a real constraint and it is published, which is more than most of this category manages. Most modern cup holders are between 2.8" and 3.4"; measure.
Three of the expanders on this page publish both numbers. Buy one of those three and you can know it fits before it arrives.
What works
- Both figures published
- Sized for normal car cup holders
- Names three bottle brands
What does not
- 3.2" ceiling rules out wide truck holders
- Single unit
- No extras
Skip this if
Skip it if your cup holder is wider than 3.2" — the Swigzy expands further.
Where these numbers came from
We have not handled this product. Here is what we did instead.
#5 · Yeti and Owala, by name
TYKOR Cup Holder Expander, bottles 3"–3.9"
TYKOR
Publishes both the bottle range it accepts (3"–3.9") and the specific tumblers it is cut for — Yeti 24/36/46 oz and Owala 12/24/40 oz.
Two numbers decide whether an expander works, and most listings publish one. The top opening has to accept your bottle; the base has to fit your car's cup holder. This one publishes the top (3"–3.9") and not the base.
Named-tumbler compatibility is the most useful form of this spec because you can check it without a caliper — you know whether you own a 40 oz Owala.
What works
- Publishes an accepted bottle diameter range
- Names specific tumblers and sizes
- Adjustable base
What does not
- Does not publish the car-side base range
- 3" is a high floor — a normal soda can will rattle in it
- One unit
Skip this if
Skip it if your bottle is over 3.9" at the base. TYKOR sells a wider model and we list it next.
Where these numbers came from
We have not handled this product. Here is what we did instead.
#6 · Hydro Flask and Yeti specifically
Cup Holder Expander with Adjustable Base, 3.4"–3.8"
Generic (adjustable base expander)
Accepts bottles 3.4"–3.8" and names Hydro Flask 32/40 oz and Yeti 24/36/46 oz — the same band as the Amazon Basics, from a different maker.
3.4"–3.8" keeps appearing across this category because it is the band the popular insulated bottles actually occupy. If your bottle is one of those, almost anything in this band works.
The car-side number is again missing, which is why we keep pointing readers at the two products that publish it.
What works
- Published bottle band
- Names specific bottle sizes
- Adjustable base
What does not
- No car-side figure
- Narrow band
- Unbranded
Skip this if
Skip it in favor of the Amazon Basics, which covers the same bottles and tells you the car-side range too.
Where these numbers came from
We have not handled this product. Here is what we did instead.
#7 · Grip, over range
JOYTUTUS Cup Holder Expander with Rubber Base
JOYTUTUS
An adjustable rubber base rather than a plastic one — the material choice that decides whether the expander turns in the holder every time you lift the bottle out.
Rubber against the cup holder wall is the difference between an expander that stays put and one that comes out with the bottle. It is the most common complaint about the plastic ones.
The trade is that JOYTUTUS publishes capacity in ounces but not diameters in inches, so you cannot check it the way you can check the Amazon Basics or the Swigzy.
What works
- Rubber base grips
- Wide capacity range in ounces
- Names Yeti and Hydro Flask
What does not
- Publishes no diameter figures at all
- Ounces are not a fitment spec — two 32 oz bottles can differ in base diameter
- Single unit
Skip this if
Skip it if you want to check the fit before it arrives. Three products on this page publish the numbers; this one does not.
Where these numbers came from
We have not handled this product. Here is what we did instead.
Working out whether yours fits, in two steps
- Measure the base of your bottle — the widest part of the bottom third, not the lid. Compare it against the accepted-bottle column above.
- Measure the top opening of your car's cup holder. Compare it against the fits-car-holder column, which only three products in this category publish.
The three products you can actually verify before buying
Amazon Basics, Swigzy and Smart Kup are the only ones on this page that publish both diameters. That is the reason they are ranked where they are, ahead of products with wider ranges: a range you can check against your own car beats a wider one you cannot.
What we could not find
Manufacturer-published base diameters for the bottles themselves. Yeti, Hydro Flask, Stanley and Owala publish capacity and height readily; base diameter is much harder to find and we are not going to print figures for them that we have not sourced. That is why this table is organized around what the expander makers state, and why step one above is a ruler.
How we picked these
Every expander whose listing publishes at least one fitment figure, ranked by how much they publish rather than by how wide their range is. Sources are cited per row and per product card. We have not handled any of them.
Sources
Everything on this page traces back to one of these. Where a figure could not be sourced, the page says so rather than filling the gap.
- TYKOR cup holder expander, bottles 2.7"-4.2", Yeti 24/36/46 oz, Stanley 14-40 oz — retailer listing, Amazon.com
- Amazon Basics cup holder expander, base 2.5"-3.75", bottles 3.4"-3.8" — retailer listing, Amazon.com
- Swigzy cup holder expander, base 2.6"-3.8", drinks 2.8"-3.85" — retailer listing, Amazon.com
- Smart Kup cup holder expander, car holders up to 3.2", bottles up to 3.8" — retailer listing, Amazon.com
