OEM & ODM stainless steel drinkware from our own factory in Zhejiang — MOQ 500 pcs, samples in 3–7 days.
Get QuoteHead To Head
What the vacuum actually buys, and when a single wall is the right answer.
Side By Side
| What changes | Double-wall vacuum | Single wall |
|---|---|---|
| How it works | Two walls with the air evacuated between them. With no air to conduct, heat has almost nowhere to go. | One wall. The drink equilibrates with the room in minutes. |
| What it does to the outside | Stays at room temperature while the drink is hot, and does not sweat when the drink is cold. | Takes the temperature of the contents, and condenses in humid air. |
| Thermal result | Published as a family reference range for the references the site prints it for; the commercial figure depends on the body, the lid and the test method, so it is confirmed per order. | No insulation claim is made, because there is no insulation. |
| Weight | Heavier for the same capacity — there is a second wall and a vacuum space. | Lighter, which is the whole reason some programmes still specify it. |
| Cost | The largest single cost difference in the product, because there are more forming and brazing steps. | Materially cheaper per piece. |
| How you know it worked | Vacuum retention is tested — every piece, not a sample. | Nothing to test. The wall is either formed or it is not. |
| Where it is the right answer | Anywhere the drink is carried, and anywhere the outside of the vessel is held. | Give-away volume, cold-drink promotional runs, and products where weight is the constraint. |
Deciding
Asked Before You Order
The short answer is at the top of this page and the two lists below spell it out: choose Double-wall vacuum when the first three conditions on its list are true, and Single wall when they are true of the other. If neither list reads like your programme, that is a useful answer too — send the requirement and we will say which of the two it actually is rather than sell you the dearer one.
It can. The published windows are samples in 3–7 days and production in 10–25 days after sample approval, and a route that needs a component the plant does not hold, or a material with a narrower mill supply, sits at the longer end of that rather than outside it. It is worth confirming the specific combination rather than assuming the generic window.
Usually, yes, and it is a sensible way to test the market: a small run of each, judged on the same shelf. What it changes is the minimum, because the minimum applies per colour and per setup rather than per order — so two routes can mean two minimums.
It moves it in a direction this page can name without quoting a number: single wall is the cheaper route unless the programme needs a feature only double-wall vacuum provides. Unit cost is quoted against the body, the decoration, the quantity and the destination, so the honest comparison is between two quotations on the same brief.
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