OEM & ODM stainless steel drinkware from our own factory in Zhejiang — MOQ 500 pcs, samples in 3–7 days.

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How this is checked

Manufacturing Base

Nine Thousand Square Metres Of Controlled Process

Tube cutting, metal forming, vacuum brazing, polishing, cleaning, coating, printing, assembly, inspection and warehousing — one continuous flow, with the final route confirmed for each programme.

  • 150KpcsWeekly Capacity
  • 9,000m²Plant Area
  • 200peopleTeam
  • 10linesProduction Lines

Vertical integration is not a substitute for evidence. It is the reason we can show the relevant process, sample and inspection record to a buyer. Our published base is in Yiwu, Jinhua, Zhejiang, China; the legal/export entity is Yiwu Lvinterest Technology Co., Ltd. Request current company and factory records if your onboarding process requires them.

When a colour needs adjusting or a sample fails a drop test, the person who can fix it is in the next workshop, not in another province. The exact production route and capacity are confirmed for each programme before the date is committed. Sustained output across the vacuum, coating and assembly lines runs at about 150,000 pieces a week — roughly 600,000 pieces a month.

Production Flow

Nine Workshops, One Continuous Process

Follow the material from coil to carton. Every stage below happens inside the same plant.
Tube Cutting & Metal Forming
Stage 01

Tube Cutting & Metal Forming

Automated cutting, expanding and necking lines with robotic handling. Dimensional capability is verified hourly against the master sample.

Automated lines
Vacuum Brazing
Stage 02

Vacuum Brazing

The step that decides whether insulation works at all. Double-wall assemblies are brazed under controlled vacuum and pressure-tested before release.

Pressure tested
Polishing & Surface Prep
Stage 03

Polishing & Surface Prep

Mirror, satin and brushed finishing on dedicated lines, followed by a multi-stage wash to remove polishing compound before coating.

Multiple finishes
Coating & Printing
Stage 04

Coating & Printing

Powder coating and wet paint with Pantone matching, plus silk screen, laser and transfer printing for decoration.

Pantone matched
Assembly & Accessories
Stage 05

Assembly & Accessories

Lid assembly, gasket fitting, accessory pairing and function testing, including open/close cycle checks on sampled pieces.

Function tested
Inspection & Labelling
Stage 06

Inspection & Labelling

In-line dimensional checks, vacuum retention testing, leak testing and appearance sampling against the approved limit sample.

AQL sampling
Packing
Stage 07

Packing

Retail packing, carton assembly, barcode labelling and container loading plans prepared to your retail or distribution requirement.

Retail ready
Warehousing & Inventory
Stage 08

Warehousing & Inventory

Separate raw material, semi-finished and finished goods stores, so a repeat order does not wait on material.

Material buffered
Laboratory
Stage 09

Laboratory

In-house testing for insulation performance, leak resistance and material verification, plus coordination with third-party labs.

In-house testing

Stations & Checks

What Runs Where, And What Each Station Catches

Nine stages, and the check that happens at each one. A visiting buyer asks two questions at every station — what is this, and what does it refuse — and the second is the one that decides whether the line is under control.
Come and walk it
Production stages and the control point at each one
StageWhat runs thereWhat is checked
Tube cutting & metal formingAutomated cutting, expanding and necking lines with robotic handling.Dimensional checks at cutting and forming, with hourly capability verification against the master sample.
Vacuum brazingDouble-wall assemblies brazed under a controlled vacuum.Pressure tested. This is the step that decides whether the insulation works at all.
Polishing & surface preparationMirror, satin and brushed finishing on dedicated lines.Multi-stage wash to remove polishing compound, checked before coating.
Coating & printingPowder coating and wet paint with Pantone matching, plus silk screen, laser and transfer printing.Approved limit samples held for colour, texture and print registration.
Assembly & accessoriesLid assembly, gasket fitting, accessory pairing.Open and close cycle testing on sampled units, to catch gasket and thread wear.
Inspection & labellingIn-line dimensional checks, vacuum retention testing, leak testing, appearance sampling.AQL sampling against the approved sample, plus 100% vacuum testing on the vacuum range.
PackingRetail packing, carton assembly, barcode labelling, container loading plans.Pre-shipment AQL inspection of packing and appearance, with photographs and a written report before release.
Warehousing & inventorySeparate raw material, semi-finished and finished goods stores.Material is buffered, so a repeat order does not wait on a new mill delivery.
In-house laboratoryInsulation performance, leak resistance and material verification, plus coordination with third-party testing.Records archived against the order number for future reference.

The stages come from the workshop list above and the checks from the eight control points on the quality page, so the three pages describe one process rather than three. Machine lists, line counts and shift patterns are confirmed during an audit or a tour rather than published as a figure that would go stale.

Planning

How To Read The Capacity Figure

Sustained output is published as a weekly figure rather than a daily one, because that is the period the plant is actually scheduled over. Forming, vacuum and coating are the stages that set the ceiling; assembly, inspection and packing are scheduled to the order behind them.

What that means in practice is that capacity is finite and it is a real constraint rather than a marketing number. A peak-season programme, a gifting run with a fixed hand-over date, or anything landing near a national holiday is worth booking early rather than assumed — and an enquiry that names the date gets an honest answer about whether the slot exists.

Verify It

Three Ways To Check This Plant

  • Walk the nine stages on site in Zhejiang, against a checklist you send in advance.
  • Take a live video walk during working hours, in your time zone by arrangement.
  • Nominate a third-party inspector — SGS, Intertek or your own — and review the batch records with them.
  • Ask for the audit record: what is documented, how long it is kept, and what it covers.

On The Floor

The Site In Yiwu, Zhejiang

Tube cutting and metal forming on the production floor
A vacuum brazing furnace in the metal workshop
Polishing and surface preparation before coating
Coating and printing applied to formed bodies
The assembly line, where parts are fitted to the bodies
Finished drinkware and production volume on the packing floor

Exhibition

Where Clients See The Range In Person

Visits are welcome. Tell us the programme and we will have the relevant samples, colour chips and lid options prepared before you arrive.
Two visitors talking across a table at the Everchill stand
Three visitors smiling for the camera in front of the bottle display
A group reading printed material together at the stand
Three visitors giving thumbs up in front of the Everchill bottle wall
Three visitors comparing sample bottles with a representative at the stand
Two visitors at the stand with a representative in a blue shirt

Next

See How We Control Quality

Material verification, in-process inspection, performance testing and pre-shipment AQL — all documented per order.