Retention hours only compare when the stated conditions match · review
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.
A 500 ml brushed stainless flask with a stated vacuum between a SUS 201 outer shell and a SUS 304 inner shell, a removable screw lid with a full-jacket gasket, and a carry handle on the top.
Most listings here say stainless steel and stop. This one names SUS 201 outside and SUS 304 inside, and it states a vacuum rather than only a double wall. It also states the flask is safe with carbonated drinks, which is a claim about the seal as much as the shell.
24 hours cold, 12 hours hot — the same pair as four other flasks here. The starting temperature, the ambient temperature and the fill level are absent, exactly as they are everywhere else in the hub. Two flasks quoting the same hours have not necessarily been measured the same way, and here none of them says how.
No mouth diameter. The flask is stated dishwasher safe, which reduces the problem, but a brush still has to fit for anything the machine misses.
No base diameter, despite the listing stating it suits a car holder. No empty weight. No replacement gasket offered.
The full-jacket gasket is the wear part. Nothing on the page says one can be bought, so plan on the flask outliving it.
The American Amazon catalog lists it with no seller standing behind the entry.
Every figure here is what Keepa held 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 — stated |
|---|---|
| Wall construction | Double stainless shell with vacuum insulation — stated; also stated to be safe with carbonated drinks |
| Steel grade | SUS 201 outer shell and SUS 304 inner shell — both stated |
| Hot retention | 12 hours — stated |
| Cold retention | 24 hours — stated |
| 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 | Removable screw lid with a full-jacket gasket, stated 100% leak-proof; a carry handle sits on the top |
| Seal availability | Not published on the listing — the gasket is named as a full-jacket seal, and no replacement is offered |
| Base diameter | Not published on the listing — the flask is stated to suit a car holder, with no figure |
| Finish | Brushed stainless steel — stated |
| Empty weight | Not published on the listing |
| Amazon reference | B0DTPXHFV4 |
| EAN | 4062861852903 |
It is a statement about the two surfaces separately, which is unusual on this shelf. The inner shell is the one your drink touches; the outer shell is the one that gets knocked. Naming both is more information than any other listing here gives, and this page reports it without judging the choice.
The maker states it is, and repeats it twice. What the listing does not state is whether the gasket should be removed first, which on a full-jacket seal is the part that traps water.
No. Not published on the listing — no starting temperature, ambient temperature or fill level is given behind either figure. What the listing does publish instead is the wall construction: Double stainless shell with vacuum insulation — stated; also stated to be safe with carbonated drinks.
7.8/ 10
The listing that behaves best on materials in this hub — a vacuum, two named steels, a named gasket — and that still leaves the mouth, the base and the weight blank.
A day out where a named inner steel, a stated vacuum and a dishwasher-safe body matter more than the hours quoted.
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
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
40 oz · vacuum insulated · food-grade stainless, grade not named · 12 h hot and 24 h cold stated · wide mouth, stated to take ice · straw, chug and handle lids · matte powder coat · twelve dollars
Three lids — straw, twist spout and carry handle — on a forty-ounce wide-mouth bottle with a matte powder coat, for twelve dollars.
Best for: A gym bag and a car boot both, where one bottle has to be a straw bottle, a pour bottle and a carry bottle
≈ $12
Prices in these summaries were read on the dates each review gives. The live figure sits beside every product.
