Retention hours only compare when the stated conditions match · review
A 500 ml (17 oz) vacuum flask in 18/8 steel, 12 h hot and 24 h cold stated, with a cotton sleeve; no weight published and no US seller right now.
A 500 ml double-wall vacuum flask in stated 18/8 food-grade stainless steel, with a screw cap, a cotton protective sleeve in the box, and a choice of thirteen colors.
12 hours hot for coffee, 24 hours cold for water. Tying each figure to a drink is a small piece of extra information, and it stops there: no starting temperature, no ambient temperature, no fill level. Treat the pair as the same unqualified claim most flasks on this shelf make.
The listing states the double wall minimizes condensation, which is a claim about the outside of the flask rather than about the drink. On a cold fill in a pack, that is the difference between a dry pack and a damp one, and it is the sort of claim only a vacuum construction supports.
No weight, on a flask described as lightweight. No mouth diameter, on a flask described as easy to clean. No base diameter, on a flask stated to fit many cup holders. No coating named, behind thirteen colors.
The sleeve changes the diameter the flask presents to a cup holder or a bottle pocket. Neither figure is published, so measure the pocket you intend to use.
Listed on Amazon.com with no seller standing behind the entry when we checked on October 20, 2026. For a 500 ml (17 oz) flask you can order in the US today, see the Mont Clair double-walled flask or the Thermos Stainless King, and compare the rest in our insulated flasks shelf.
Every figure here is what we found on the day this page was last revised. Offers and prices shift without warning.
A listing is not an offer: the reference exists on these stores, availability changes daily.
| Capacity | 500 ml (16.9 fl oz) — stated |
|---|---|
| Wall construction | Double-wall vacuum insulation — stated, and stated to reduce condensation on the outside |
| Steel grade | 18/8 stainless steel — stated, described as food grade |
| Hot retention | 12 hours — stated, quoted for coffee |
| Cold retention | 24 hours — stated, quoted for water |
| 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 |
| Lid type | Screw cap — stated, described as helping to prevent leaks |
| Seal availability | Not published on the listing |
| Base diameter | Not published on the listing — the flask is stated to suit many cup holders, with no figure |
| Finish | Not published on the listing — thirteen colors are offered and a cotton sleeve is supplied; the coating itself is not named |
| Empty weight | Not published on the listing — the flask is described as lightweight, with no figure |
| Amazon reference | B07KFPCGFC |
| EAN | 7437337288291 |
The listing does not say. It uses the word twice and gives no figure, and no flask on this shelf publishes an empty weight either. On a 500 ml stainless flask the difference between listings is real and none of them will tell you what it is.
The maker does not address it. The sleeve is presented for grip and carrying, and the 12 and 24 hour figures are quoted without any conditions at all, so nothing on the page says whether they were arrived at with the sleeve on or off.
Not when we last checked: the listing exists on Amazon.com but no seller stands behind it. For the same 500 ml (17 oz) size on sale in the US, the Mont Clair double-walled flask is the closest match on this shelf, and the Thermos Stainless King is the established American option.
The listing does not say. No starting temperature, room temperature or fill level is given behind either figure, so treat them as the maker's claim rather than a test result, and preheat the flask with hot water to get the most out of it.
7.8/ 10
A straightforward 500 ml vacuum flask with its steel named and its hours quoted. It calls itself light and will not say how light, a gap it shares with most flasks on this shelf. It also had no US seller when we last checked.
A commute or a day walk where a sleeve and a plain screw cap suit better than a straw or a flip lid.
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
Prices in these summaries were read on the dates each review gives. The live figure sits beside every product.
