Ask a supplier “how much does a container of tea cost” and the honest answer is: it depends less on the tea than on how well the container is planned. Ocean freight is charged per box, not per kilo, so the same 20-foot container can carry 12 tonnes of efficiently packed bulk leaf or 6 tonnes of carelessly specified cartons — and the second importer pays nearly double the freight on every kilo he lands. Yet container loading is the most under-specified part of most tea purchase orders. Buyers who will negotiate moisture percentages to a decimal often leave the packing format, the pallet question and the stowage plan entirely to chance.
This guide walks through container loading for bulk tea exports the way an experienced importer plans it: what a 20GP, 40GP and 40HQ actually offer in floor area, cube and payload; how the packing format you choose sets the ceiling on how much tea fits; the step-by-step loading arithmetic; the weight limits that apply after the ship; how moisture, odour and crush damage are prevented in stowage; and how freight cost per kilo changes between a 20GP and a 40GP. It closes with the commercial terms — MOQ, samples, ports and payment — and a pre-loading checklist you can send to any supplier. If you are still assembling the paperwork side of a first order, pair this with our tea export compliance guide and our documents and certificates checklist.
Why Container Planning Decides Your Landed Cost
For most tea importers, ocean freight is the third-largest cost in the landed price after the tea itself and duty. Unlike tea and duty, freight is almost entirely a planning variable. The freight quote for a 20-foot box is the same whether it holds 7 tonnes or 11.5 tonnes of leaf, so every kilo of “air” you ship is pure waste. On a lane quoting USD 2,000 for a 20GP, a well-planned load at 11.5 MT costs about USD 0.17 per kilo in freight; a poorly planned one at 7 MT costs USD 0.29. Over a year of steady volume, that gap is a margin line, not a rounding error.
Container planning also protects quality in transit. Tea is hygroscopic and odour-absorbent: it takes on moisture from a damp container floor and taints from a previous cargo of spices or chemicals in minutes, not days. And it is fragile in bulk — lower layers of an overloaded stack deform, break, and shed dust into the brew. Good loading practice therefore has three goals at once: maximise payload, keep the leaf dry and untainted, and never exceed the crush strength of the packing at the bottom of the stack. The rest of this guide is those three goals turned into numbers.
Know Your Box: 20GP, 40GP and 40HQ Compared
Three container types cover nearly all tea trade. The 20GP (20-foot general purpose) is the workhorse of bulk loose tea: small enough to fill completely, cheap to position, and well matched to the floor-loading limits of destination markets in Africa, the Middle East and Central Asia. The 40GP carries more than double the cube for far less than double the freight, but for dense bagged tea its payload is usually limited by crush strength and road weight rules rather than volume. The 40HQ adds interior height and suits carton-packed and retail-ready cargo, where cube — not weight — is the binding constraint.
| Specification | 20GP | 40GP | 40HQ |
|---|---|---|---|
| Internal dimensions (L x W x H) | 5.90 x 2.35 x 2.39 m | 12.03 x 2.35 x 2.39 m | 12.03 x 2.35 x 2.70 m |
| Internal volume | approx. 33.2 cubic m | approx. 67.7 cubic m | approx. 76.4 cubic m |
| Typical max payload (check line rules) | approx. 21,700-28,200 kg | approx. 26,000-26,700 kg | approx. 26,000-26,700 kg |
| Typical floor area usable | approx. 13.9 sq m | approx. 28.3 sq m | approx. 28.3 sq m |
| Bulk tea in 25-30 kg woven bags (typical) | 10-12 MT | 18-22 MT | 18-22 MT |
| Carton-packed tea (typical) | 4-5 MT | 9-11 MT | 10-12 MT |
| Best for | Bulk woven bags, heavy loads, first orders | Large bulk programs, mixed lots | Cartons, retail-ready and OEM packaging |
Treat the tea-loading rows as planning figures and confirm them against the exact packing specification before booking: bag dimensions, carton sizes and whether pallets are used all move the outcome. Payload limits also vary by container line and by the container’s actual tare weight, so have the carrier confirm the figure for the specific unit assigned to your booking.
Packing Format: The Real Variable in the Equation
The container does not decide how much tea fits — the packing format does. The same black tea leaves the factory at very different densities depending on whether it is packed for a blending house, a tea-bag factory or a supermarket shelf.
Woven bags: maximum payload
The bulk export standard for loose leaf is a 25-30 kg PP woven bag with an inner PE liner. Compressed leaf tea is dense — roughly 300 kg per cubic metre packed — so woven bags turn almost all of the container cube into payload. This is the format behind the familiar planning figure of 10-12 MT per 20GP and 18-22 MT per 40GP. The PE liner is not optional: it is the moisture barrier between the leaf and the container atmosphere.
Export cartons and retail-ready packing
Cartons trade density for presentation and downstream handling. A 5-10 kg export carton carries its own board, and headspace is left so the carton stacks without crushing — effective density drops to well under half that of woven bags. Retail-ready OEM packs (printed pouches, boxes, display cartons) go further still. The loading figures for carton formats in the table above are roughly half or less of the woven-bag figures; this is not waste, it is the cost of shelf-ready packaging, but it must be priced into the landed cost consciously.
Palletized or floor-loaded
Palletising adds handling safety and destination-warehouse speed, and costs payload. A standard 1.2 x 1.0 m pallet with stacking height consumes floor and leaves corner gaps; expect to give up roughly 15-25% of the loose-loaded weight in exchange. Many importers floor-load 20GP boxes of woven bags and reserve pallets for carton cargo destined for automated warehouses. If your consignee has a forklift-only facility, palletise; if tea is restacked by hand at destination, floor-load and accept the labour.
| Packing format | Unit | 20GP typical load | 40GP typical load | Cube efficiency vs woven bag |
|---|---|---|---|---|
| PP woven bag + PE liner | 25-30 kg bag | 10-12 MT | 18-22 MT | 100% (reference) |
| Export carton, 10 kg net | carton | 4-5 MT | 9-11 MT | approx. 40-50% |
| Export carton + inner retail packs (OEM) | carton | 3-4 MT | 7-9 MT | approx. 30-40% |
| Palletized woven bags | pallet | 8-10 MT | 15-18 MT | approx. 75-85% |
The Loading Math, Step by Step
You do not need software to sanity-check a loading plan — a floor plan and a stacking calculation are enough. Work the example of a 20GP loaded with 30 kg woven bags measuring roughly 60 x 40 x 25 cm:
Step 1 — per layer. Floor is 5.90 m x 2.35 m. Bags laid lengthwise: 5.90 / 0.60 = 9 rows; across: 2.35 / 0.40 = 5 columns. That is 45 bags per layer, or 1,350 kg per layer.
Step 2 — layers. Interior height 2.39 m divided by 0.25 m gives 9 layers with clearance. Total: 45 x 9 = 405 bags = 12,150 kg. That is the top of the 10-12 MT planning band — real loads come in slightly under it because bags settle unevenly, door clearance narrows the last metre, and dunnage takes space.
Step 3 — crush check. Nine layers puts about 240 kg of static load on the bottom row of bags. A 30 kg woven bag of compressed leaf tolerates this comfortably, which is why woven-bag stacks go high. Do the same check with retail cartons: a display carton rated for 5 layers cannot carry a 9-layer stack, so the carton stack — not the container — sets the limit.
Step 4 — door end. The last row at the doors is the most exposed in transit. Floor-loaders either fill the door gap with dunnage bags or build the final row double-stacked and locked with a timber brace, so braking and rolling in the ocean leg cannot open a gap that lets the stack collapse when doors are opened at destination.
Weight Limits Beyond the Container: VGM and Road Legs
A container can legally hold far more weight than it can practically deliver. Under SOLAS, every packed container needs a Verified Gross Mass (VGM) declaration before loading — your packing list and weighbridge ticket feed it, and an understated VGM can mean the box is not shipped at all. The harder limits usually appear on the road legs. In the EU, a 40-foot combination is capped around 44 tonnes gross vehicle weight, which leaves roughly 24-26 tonnes of payload after tractor, chassis and the container’s own 3.7-4.0 tonne tare. Several US states and many African and Central Asian road networks are stricter still. A 40GP stuffed to 26 MT may be legal on the ship and illegal on the truck that must move it from the port to your warehouse.
This is why the practical answer to “how much tea fits in a 40GP” is usually 18-22 MT rather than the theoretical maximum, and why the destination matters as much as the container. Rail lanes — significant for Central Asian markets such as Kazakhstan and Uzbekistan — tolerate heavier boxes than road, which is one reason heavy bagged tea still moves efficiently on China-Europe and China-Central Asia rail services. Tell your supplier the destination delivery leg when you book so the stuffing plan respects the last kilometre, not just the first.
Stowage Discipline: Moisture, Odour and Crush
Tea fails in transit for three reasons, and all three are preventable at stuffing time.
Moisture. The leaf leaves the factory at or below the contract limit — under GB/T 14456 green tea and equivalent black tea standards, moisture is specified at around 6.5-7.0%, and every point of moisture re-absorbed in transit is shelf life lost and mould risk gained. A container that has carried wet or refrigerated cargo can hold litres of condensable water in a damp floor and wall lining. Insist on a dry, odour-free, recently swept unit; check the floor by hand and sight before stuffing. Inside the box, keep the PE liners sealed until the doors close, add container desiccants (typically 6-12 strips for a 20GP of tea, more for humid lanes), and avoid stuffing on rainy days where the schedule allows.
Odour and taint. Tea absorbs the smell of its neighbours. A box previously used for garlic, chemicals, fishmeal or spices can taint an entire load beyond rescue. Ask for a container with clean recent history, smell it before stuffing, and never consolidate tea with odorous cargo in the same box — mixed tea containers should carry only tea and tea packaging.
Crush and shift. Stack to the crush rating of the bottom layer, not the ceiling of the box. Fill vertical gaps with dunnage bags or kraft air pillows, brace the door end, and keep a photo record of the stuffed condition — floor, walls, stack, seal — as part of the shipment file. Those photographs are the first evidence examined when an arrival claim meets resistance, alongside the pre-shipment inspection documents described in our compliance guide.
Freight Cost per Kilo: Choosing Between 20GP and 40GP
Freight rates move with the market, but the arithmetic of container choice barely does. The 40GP and 40HQ are almost always cheaper per kilo than a 20GP, provided the extra cube can actually be converted into payload. The comparison below uses illustrative rates on a long-haul lane — substitute your current quotes before deciding.
| Scenario | Illustrative freight (USD) | Tea loaded (MT) | Freight per kg (USD) | Read |
|---|---|---|---|---|
| 20GP, woven bags, well stuffed | 2,000 | 11.5 | 0.17 | Reference case for bulk leaf |
| 20GP, cartons, same freight | 2,000 | 4.5 | 0.44 | Carton formats pay 2.5x the freight per kg in a 20GP |
| 20GP, woven bags, poorly stuffed | 2,000 | 7.0 | 0.29 | Every 1 MT of air costs about USD 0.03-0.04 per kg across the load |
| 40GP, woven bags | 3,000 | 20 | 0.15 | Bulk programs: cheapest per kg, subject to road limits |
| 40HQ, cartons / OEM packs | 3,200 | 11 | 0.29 | Retail-ready programs: accept lower density, use the HQ cube |
| LCL consolidation, per CBM | 75 per cubic m | n/a | approx. 0.25-0.45 | Sensible below roughly 6-8 MT; above that, book a 20GP |
Two conclusions survive every rate cycle. First, bulk woven-bag cargo strongly favours full-container loads — LCL stops making sense surprisingly early for dense tea. Second, the denser the packing format, the more a 40GP saves; conversely, for carton and OEM programs the 40HQ’s extra height is worth more than the 40GP’s extra length.
MOQ, Mixed Containers and Trade Terms
Container planning and commercial terms meet in the stuffing plan. Most importers do not ship one grade per box: a typical mixed container combines a hero grade for the branded line, a tea-bag grade for the bag line, and an economical base for blending — for example Chunmee 41022 alongside a fannings grade, or a CTC BP grade for tea-bag production. Loading is sequenced so the grades needed first at destination are stuffed last, and every item in the mix carries its own lot number and COA for traceability.
| Commercial item | Standard terms | Notes |
|---|---|---|
| MOQ (bulk loose tea) | 500 kg per item | Mixed containers combine several items, each above its own MOQ |
| MOQ (OEM / private label) | 300 kg per SKU | Printed packaging quoted and approved separately before production |
| Samples | 50-200 g free of charge | Courier collect; cup before you commit a container |
| Packing | 25-30 kg PP woven bag + PE liner; 5-10 kg export carton | Bag or carton spec fixed in the contract; it drives the loading plan |
| Incoterms | FOB Ningbo / Shanghai / Xiamen | CIF and DDP quoted on request against your destination port |
| Payment | T/T 30% deposit + 70% against B/L copy; L/C at sight | L/C common on first orders and tender business |
| Lead time | Stock items approx. 7 days; OEM 15-25 days | OEM includes plate making and packaging approval |
| Documents | Invoice, packing list, B/L, CO, phytosanitary, health certificate, COA per lot | Check the packing list against the VGM declaration before gating |
For Central Asian buyers moving cargo by rail through Khorgos or Alashankou, and for buyers serving landlocked destinations via Bandar Abbas or Poti, the same terms apply with the routing adjusted — see our Kazakhstan market page for how rail-borne tea programs are structured, including the heavier loading limits rail allows.
Pre-Loading Checklist to Send Your Supplier
Copy this list into your purchase order. Each line has prevented a real claim somewhere.
1. Container inspection before stuffing: clean, dry, odour-free floor and walls; no holes, rust perforations or residual cargo debris; photograph floor, walls and door seals. 2. Stuffing supervision on first orders and high-value lots: third-party or named inspector, photos at 0%, 50% and 100% stuffed. 3. Desiccants installed per the agreed quantity; PE liners sealed before doors close. 4. Stack within the crush rating of the lowest layer; dunnage bags fill vertical gaps; door end braced. 5. Door-end photo and high-security seal number recorded on the packing file. 6. Weighbridge ticket and VGM filed against the booking. 7. Lot numbers, bag counts and gross/net weights reconciled against the packing list before the truck leaves the factory.
Five Mistakes That Cost Importers Money
Letting the factory choose the packing format by default. The format decides freight per kilo, destination handling and shelf readiness — specify it, price it, and own it. Stuffing a 40GP to its paper maximum. The box may sail, but the truck at destination sets the real limit; over-stuffed boxes end in port storage fees and transloading costs. Skipping the container inspection. A damp or tainted box is discovered by your customers, not by you. No door bracing or dunnage. Stacks that survive the ocean and fail when the doors open at a tilted warehouse are a classic avoidable loss. No photo file. Without stuffed-condition photographs and a seal record, an arrival claim becomes an opinion contest you are likely to lose.
Frequently Asked Questions
How many kilograms of tea fit in a 20-foot container?
A 20GP loaded with 25-30 kg PP woven bags of compressed loose leaf typically carries 10-12 MT. Carton-packed tea reaches only about 4-5 MT in the same box because cartons add board and headspace. The exact figure follows from the packing specification: divide the container floor by the unit footprint, multiply by safe layers, and verify against the crush rating of the lowest layer.
Should I palletize my tea shipment or floor-load it?
Floor-load woven bags when destination handling is manual and payload matters — pallets cost roughly 15-25% of the load. Palletize carton cargo destined for automated warehouses or fast cross-docking, where handling savings exceed the payload loss. Fix the choice in the contract, because it changes the loading plan and the freight per kilo.
What is the difference between 20GP, 40GP and 40HQ for tea?
The 20GP holds about 33 cubic metres and is the standard for heavy bulk woven-bag loads of 10-12 MT. The 40GP doubles the cube for less than double the freight and typically carries 18-22 MT of bagged tea, limited by road weight rules rather than volume. The 40HQ adds interior height, which mainly benefits carton and retail-ready cargo where cube, not weight, is the constraint.
How do you protect tea from moisture and odour inside the container?
Use only a clean, dry, odour-free container with an intact floor; keep the inner PE liners sealed until the doors close; install container desiccants sized to the lane; avoid stuffing in rain; and never consolidate tea with odorous cargo. Record the container inspection with photographs before and after stuffing.
What MOQ and terms apply to a mixed tea container?
MOQ is 500 kg per item for bulk loose tea and 300 kg per SKU for OEM or private label, and a mixed container combines several items each above its own MOQ. Samples of 50-200 g are supplied free, with courier collect. Standard terms are FOB Ningbo, Shanghai or Xiamen, with T/T (30% deposit, 70% against B/L copy) or L/C at sight.
Next Step: Plan Your First Container With Us
Send us your destination port, delivery leg and target packing format, and we will return a loading plan with bag or carton counts, indicative freight per kilo and a firm FOB quote from Ningbo, Shanghai or Xiamen — MOQ 500 kg per bulk item, 300 kg per OEM SKU, free 50-200 g samples, T/T or L/C at sight. Smileaf Tea is an SC-licensed, ISO 22000-certified exporter; every lot ships with per-lot COA documentation and pre-shipment inspection on request, and our import documents checklist covers the certificate side from health certificates to VGM filing. Request a loading calculation with your next sample order and see the container maths on your own specifications.