per unit at 1,000 units — goods, agent fee, freight, US import fees and delivery. Duty is not included; see below.
Basis: Aggregated from 36 current wholesale listings in this category, costed with our standard import model. volume and weight assume a typical export carton for this category, not one supplier's packing list — 39 × 39 × 55 cm, 50 per carton, 17 kg gross, giving 0.00167 CBM and 0.34 kg per unit; your own carton will move the freight line. duty excluded, because the rate depends on how your product classifies — the table below shows what any rate adds. figures as of 1 September 2026. individual figures are not attributable to any one supplier.
What duty adds
We do not publish a single duty rate for this category, because classification depends on the product's construction and materials rather than on what it is called. Rather than print a number that would be wrong for some readers, here is what any given rate does to the figures above.
| Duty rate | Landed per unit | Versus no duty |
|---|---|---|
| No duty | $3.95 | — |
| 5% | $4.12 | +4.3% |
| 12% | $4.36 | +10.4% |
| 25% | $4.80 | +21.7% |
| 37% | $5.21 | +32.1% |
Establishing your own rate is your responsibility as importer rather than your supplier's — our guide to classification sets out how, including requesting a binding ruling if you intend to import repeatedly.
An insulated bottle is a pressure-tested assembly pretending to be a simple product. Two steel shells are welded, the cavity is evacuated, and the whole thing is sealed. Everything expensive about it happens inside that cavity, where you cannot see it, and everything that goes wrong shows up weeks after the customer starts using it.
Where the money goes
Two fixed costs dominate a first order. Tooling, if the bottle shape is not already in the factory's catalogue, is quoted separately and amortised over the run. And the finishing process — powder coating, printing, electropolishing the interior — is a per-unit cost that varies far more than buyers expect between a cheap job and a durable one.
The product is dense and stacks reasonably well, so freight sits in the middle of the range. It is not the lever here. The lever is deciding whether you need a custom shape at all, because using an existing mould changes the economics of a first order more than any negotiation will.
What drives cost in this category
Steel grade
Food-grade austenitic stainless and cheaper alternatives look identical and behave differently over time, particularly with acidic drinks. This is the substitution to guard against.
Vacuum quality
Insulation performance depends on the vacuum holding. A marginal weld or seal passes on day one and fails within months, and the customer experiences it as "it stopped keeping things hot".
Tooling
A distinctive body shape means a new mould, quoted separately. Existing shapes with your branding are how most viable first orders are structured.
Lid design and sealing
The lid is where most complaints originate and it is often a bought-in component. Specify it as carefully as the bottle, because leaks in a bag are what generate returns.
Minimum order quantities
| Existing shape, factory's standard colours | Lowest floor. You are buying into a run the factory already schedules. |
| Existing shape, custom colour and logo | Rises with the coating batch, which is usually the constraint rather than the bottle itself. |
| Custom lid or accessory | Set by the component maker's minimum, not the bottle factory's. |
| New body tooling | Highest floor, plus mould cost. Agree ownership, storage and transfer rights before it is cut. |
Where these are made
Vacuum flask production is a mature cluster in Zhejiang, with Yongkang the best-known centre and export handling usually routed through Ningbo. Because lids, straws and silicone seals often come from separate specialists, this is another category where the company quoting you may be assembling — worth establishing before you decide whose test reports you are relying on.
What goes wrong
- Steel grade substitution. Invisible on arrival, consequential over time. Verify by material test on production samples, not by the marking or the supplier's assurance.
- Vacuum loss. The defining failure. It requires a thermal retention test on production units — a sample that was hand-assembled in the sample room proves very little.
- Coating adhesion. Powder coating that chips at the base after a few weeks in a bag. Adhesion and abrasion testing are cheap and rarely specified.
- Lid leaking. The most common warranty complaint, and easily caught with an inverted leak test during inspection.
Thermal retention and leak testing on units pulled from the production run are the two checks worth insisting on, and both belong in the inspection scope rather than being assumed. Write them into the specification with a pass criterion, or they are not requirements.
