Retention hours only compare when the stated conditions match · review
The flask with three lids in the box and both retention figures on the page — and no capacity anywhere in the listing, which is an unusual thing to leave out.
A powder-coated stainless flask in 18/8 steel with a double wall, supplied with three lids — a straw lid, a flip lid and a handle lid — all stated leak proof.
The listing publishes 24 hours cold and 12 hours hot, which puts it in the majority here. What it does not publish is the starting temperature, the ambient temperature or the fill level behind either number, and no flask in this hub publishes those either.
Read the pair as a claim of the same shape as the others, not as a measurement you can place against a rival.
No capacity. The bullets name 12, 16, 20 and 24 oz as the sizes that fit a cup holder, and never say which one this reference is. On a flask, that is the headline figure, and it is absent.
No mouth diameter. Narrow is a word, not a dimension, and this is the flask where it matters most: hand wash only is stated, so the brush has to fit.
No empty weight, no base diameter, no spare seals. Three lids each hide a gasket, and none of them is offered as a part.
Check the size on the product page before ordering, because this listing does not carry it, and confirm the base against your cup holder — the maker discusses cup holders without giving a diameter.
The American Amazon store was listing it at about $20 at the time of writing.
Every figure here is what Keepa held on the day this page was last revised. Offers and prices shift without warning.
Prices quoted in this text were read on October 23, 2026. The live price is at the top of the page.
A listing is not an offer: the reference exists on these stores, availability changes daily.
| Capacity | Not published on the listing — the listing names 12 oz, 16 oz, 20 oz and 24 oz as the sizes that fit a cup holder, without saying which size this reference is |
|---|---|
| Wall construction | Double wall insulation — stated; the listing does not use the word vacuum |
| Steel grade | 18/8 stainless steel — stated |
| Hot retention | 12 hours — stated, as "up to" |
| Cold retention | 24 hours — stated, as "up to" |
| Retention conditions stated | Not published on the listing — no starting temperature, ambient temperature or fill level is given behind either figure |
| Mouth diameter | Not published on the listing — the mouth is described as narrow, with no figure |
| Lid type | Three lids supplied — a straw lid, a flip lid and a handle lid, all stated leak proof |
| Seal availability | Not published on the listing |
| Base diameter | Not published on the listing — the listing states which sizes fit a cup holder rather than a diameter |
| Finish | Powder coat exterior — stated, with a laser-engraved logo |
| Empty weight | Not published on the listing |
| Amazon reference | B082H5S2N3 |
| EAN | 0810016742012 |
The listing does not say. It names four sizes that fit a cup holder and it does not tie this reference to any of them. A code in a part number is not a published capacity, so this page treats the figure as absent.
The maker states three lids come with the flask and calls all three leak proof. It does not describe the thread, and it does not say whether spare gaskets for any of them can be bought separately.
No — the listing states hand wash only, with soapy hot water. That is a maintenance decision as much as a cleaning one, because a narrow mouth washed by hand needs a brush that fits, and the mouth is not dimensioned.
7.8/ 10
Three lids, a named steel and both retention figures. Then it forgets to say how much it holds, and that single omission is the reason it cannot be lined up against the rest.
A walker who wants a straw lid on the trail and a plain lid at work, from one flask.
Amazon reports what buyers took in the month before this page was last checked: at least 600.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for camping and hiking gear and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
1 liter · 18/08 stainless · 13 h temperature stability stated, hot and cold not separated · bottle brush, jute bag and carabiner supplied
A 1 liter flask supplied with a natural-bristle brush and a carabiner, whose single retention figure of 13 hours is never split into hot and cold.
Best for: A liter bottle bought with its brush and its carry loop, where cleaning matters more than a comparable hours figure.
≈ $33
500 ml · vacuum insulated · SUS 201 outside and SUS 304 inside · 24 h cold and 12 h hot stated · brushed finish · top handle
The only flask here that names a different steel for the inside and the outside, alongside a stated vacuum, both retention figures and a brushed finish.
Best for: A day out where a named inner steel, a stated vacuum and a dishwasher-safe body matter more than the hours quoted.
8 oz · TriMax triple insulation, the only triple-wall claim here · food-grade stainless, grade not named · 24 h stated once, hot and cold not separated · removable 3 oz silicone cup · folding hidden handle · dishwasher safe, flask and cup
The only triple-wall claim on this shelf, on an eight-ounce flask with a removable three-ounce silicone cup in its base — and a single 24-hour figure that does not separate hot from cold.
Best for: A hip-pocket flask for spirits or a single coffee, where two can share from one cup
≈ $10
