Tea Bag Packaging: In-House Line or Contract Manufacturer?

The question every growing tea brand eventually asks

There is a moment in the life of almost every tea brand — usually somewhere between the first successful marketplace season and the first supermarket listing — when someone looks at the unit cost from the contract manufacturer and says: "We could buy our own machine for that."

Sometimes that is right. More often it is right about the machine and wrong about everything the machine drags in behind it. This guide sets out the decision honestly: what a tagged tea bag line really costs to run, what a contract manufacturer is actually charging you for, and where the crossover point sits for a brand selling through retail and e-commerce.

It assumes you are producing single-cup tagged bags — the format with a string and a printed label — because that is the format most consumer tea brands sell and, not coincidentally, the most demanding one to run. If you are still choosing between constructions, tea bag types explained: single-chamber, string & tag, envelope covers what each format costs you in machine terms. For how the production process itself runs once you have decided, see how tea bag manufacturing works.

Start from throughput, because it constrains everything else

A tagged tea bag line is slower than people expect. The string and tag are the reason: each bag has a thread fed, cut, attached at both ends and folded, on top of the dosing and sealing that a plain bag needs. Arovela's tagged line runs at roughly 1,000 bags per hour. That number is a useful benchmark for a single-machine operation of the type a brand would realistically buy first, and it lets you reason about capacity before you reason about money.

At 1,000 bags per hour:

• A single 8-hour shift produces about 8,000 bags — 400 cartons of 20.
• A five-day week on one shift is roughly 40,000 bags, or 2,000 cartons.
• A month is in the region of 160,000 bags, or 8,000 cartons — if the machine runs the whole time.

It will not run the whole time. Deduct changeovers between blends (cleaning down, re-threading tag reels, re-qualifying fill weight), planned maintenance, operator breaks and the inevitable stoppages that come with hygroscopic plant material and thread. Realistic sustained output on a single line with a small team is meaningfully below the nameplate figure, and every extra SKU pulls it lower.

That last point is the one that surprises brands. A range of eight blends at modest volume each is a much worse fit for one owned machine than a single hero SKU at higher volume, because the machine spends a large share of its day being reset rather than producing.

What you are actually paying a contract manufacturer for

When a brand looks at a co-packer's per-carton price and compares it with a machine's purchase price, it is comparing a total cost of production against one line of a capital budget. The manufacturer's price includes, at minimum:

The machine and its floor. Purchase, installation, spares, service contracts, and the food-grade production space it stands in, with the ventilation, pest control and cleaning regime that space requires.

Skilled operators. Tagged lines need someone who can diagnose why the thread is snapping, why fill weight is drifting, why seals are failing on a humid day. That knowledge takes time to build and it walks out of the door when the operator leaves.

Blend handling upstream of the machine. Receiving, storage under controlled humidity, sieving to tea-bag cut, weighing components, blending to a written recipe, and holding retained samples of every lot. The machine is the visible end of a process that starts weeks earlier.

Food-safety management. A registered food business, a documented HACCP plan, allergen controls, traceability from raw material lot to finished carton, and audit-readiness. Arovela operates under ISO 22000 for food safety alongside ISO 9001 and ISO 27001; a brand that brings production in-house takes on the equivalent obligations itself.

Quality documentation. Per-lot certificates of analysis on the botanicals, pesticide and contaminant results against EU limits, microbiological testing, and the in-process weight records that make a net-quantity declaration defensible.

Utilisation risk. A manufacturer spreads a line across many customers. Your volume is a slice of a machine that is kept busy. If you own it, the idle hours are yours.

Laid out side by side, the same obligations do not disappear when you buy a machine — they change owner:

The last row matters: outsourcing production does not outsource the label. Everything above it, though, is genuinely someone else's problem when you co-pack.

None of this argues that contract manufacturing is always right. It argues that the comparison brands usually make — co-packer unit price versus machine sticker price — is not a comparison at all.

The four scenarios where owning a line genuinely wins

Being fair to the in-house case, there are situations where it is the correct call:

Sustained single-SKU volume. If one or two blends account for most of your sales and their combined volume keeps a machine busy for a large share of a shift, week after week, the utilisation problem largely disappears and the economics turn.

Very short replenishment cycles. Some direct-to-consumer brands run on small, frequent batches to keep stock fresh and cash light. If your model genuinely needs bags produced this week from a blend finalised last week, an owned line removes the scheduling dependency on someone else's calendar.

Proprietary process or format. If your product depends on a bag format, fill or handling step that no manufacturer will run for you, ownership may be the only route.

Existing food manufacturing. If you already operate a registered food site with HACCP, trained staff and spare floor, the marginal cost of adding a tagging line is far lower than for a brand starting from a warehouse and a laptop.

If none of those describe you, the burden of proof sits on the in-house case.

The hidden costs that decide it

Beyond capital and labour, three costs sink more in-house tea projects than any other:

Raw material minimums. Contract manufacturers buy botanicals at scale and can offer you a share of a lot. Buy direct as a brand and you meet the supplier's per-SKU minimum yourself. Arovela's minimum for medicinal and aromatic plants is 25 kg per SKU; a five-botanical blend therefore commits you to 125 kg of raw material before your first bag, with the storage, humidity control and shelf-life management that implies. Multiply by your SKU count. How to source small runs from low-MOQ suppliers sets out the ways smaller brands work around this, and herbal tea sourcing for retail and e-commerce buyers covers how to qualify the botanical supply itself.

Working capital and stock ageing. Botanicals lose volatile oil over time; tea-bag cut material, with its large surface area, loses it fastest. Material you bought to hit a minimum and are running slowly through an under-used machine is quietly degrading. A manufacturer turning stock across many customers ages it far less.

Regulatory ownership. In the EU, the food business operator named on the pack carries the compliance liability — for labelling under Regulation (EU) No 1169/2011, for claims under Regulation (EC) No 1924/2006, for contaminant and residue limits. Producing in-house does not add liability you did not already have as the brand owner, but it removes the technical partner who was catching problems before they reached your label.

A practical crossover test

Rather than a single volume number, apply four questions. Bring production in-house only if you can answer yes to at least three:

1. Will one machine be more than half utilised by a small number of SKUs, on a sustained basis, within twelve months?
2. Do you already hold — or can you affordably hire — an operator who has run a tagged tea line before?
3. Do you have, or will you build, a registered food site with a documented HACCP plan?
4. Can you carry the raw material minimums and stock ageing for every SKU without straining cash?

Two or fewer yeses and a contract manufacturer is almost certainly the lower-cost, lower-risk answer — even at a per-carton price that looks high on a spreadsheet.

Making the contract manufacturing route work well

If the answer is co-packing, the quality of the outcome depends less on the manufacturer's price list than on how you brief them. In practice, the brands that get good results:

• Ask for bags per hour on their specific format and plan lead times from it — 6–10 weeks for a first tagged run is normal, not slow.
• Keep the first blend to three or four botanicals, specified by Latin binomial and tea-bag cut, and add complexity only once the line is qualified.
• Ask explicitly for a pilot arrangement; raw material minimums are usually firm, but pilot run sizes are frequently negotiable.
• Lock fill weight and tolerance in writing and require in-process weight records.
• Review every claim on artwork against the EU register before print, and treat "digestion", "sleep" and "immunity" language as regulatory review items, not copywriting.
• Insist on the full COA package per lot — botanical identity, pesticides, contaminants, microbiology, allergens — and file it against the lot code that actually shipped.
• Position stock sensibly. Arovela produces in Sındırgı, Balıkesir, and holds an EU distribution warehouse in Solingen, Germany; a brand selling into EU marketplaces can shorten its replenishment leg materially by drawing from inside the Union rather than shipping every order from origin.

A note on scaling from co-packing to ownership

The two routes are not opposites. Many brands run their first two or three years with a contract manufacturer, learn what actually sells, consolidate to a small number of high-volume SKUs, and then evaluate a line — at which point the utilisation question has a real answer and the operator problem is easier to solve. Starting with a manufacturer keeps that option open; starting with a machine and a range of eight blends often forecloses it.

FAQ

At what volume does owning a tea bag line start to make sense?

There is no single number, because utilisation matters more than volume. A tagged line at roughly 1,000 bags per hour yields about 8,000 bags per shift and around 160,000 a month at full running — but only if it is not being reset between blends. The practical test is whether a small number of SKUs will keep one machine more than half utilised on a sustained basis within twelve months. A range of eight modest blends almost never does.

Why is a tagged line slower than a plain tea bag line?

Every tagged bag has a thread fed, cut, attached at both the bag and the tag, and folded, on top of the dosing and sealing a plain bag needs. Those extra mechanical steps are also the extra failure points — thread snapping and tag misfeeds are the stoppages that most reduce real output against the nameplate figure.

Does using a contract manufacturer transfer regulatory liability?

No. The food business operator named on the pack carries the compliance liability for labelling, claims and contaminant limits regardless of who ran the machine. What a manufacturer gives you is a technical partner catching problems before they reach your label, plus an existing food-safety system and documentation package — not a transfer of responsibility.

How many botanicals should a first blend have?

Three or four. Raw material minimums are set per component at 25 kg per SKU, so a nine-botanical blend commits you to 225 kg before a single bag is produced, and each additional component adds a sieving, weighing and traceability step. Add complexity once the line is qualified and the SKU has sold.

What lead time should we plan for a first tagged run?

Six to ten weeks is normal for a first run, not slow. Runs of 5,000 to 20,000 bags typically take two to four weeks once blend, format and artwork are confirmed, and 50,000 to 100,000 bags four to six weeks — but blend development, sampling and artwork approval sit ahead of that clock. Tea bag MOQ and lead times for small-batch e-commerce brands breaks the tiers down further.

Arovela runs a tagged tea bag line alongside its medicinal and aromatic plant, essential oil, extract and dried fruit production in Turkey, supplying B2B buyers across the European Union and Ukraine from Sındırgı, Balıkesir and an EU distribution warehouse in Solingen, Germany. If you are weighing co-packing for a retail or online tea brand, request a quote and our team will come back with pricing, minimum order quantities and lead times for your format.