Types of Cargo in International Shipping: The 5 Categories

Before you ask for a freight quote, there's a question most shippers skip: what type of cargo is this? The answer decides the equipment, the mode of transport, the paperwork and the way you'll be charged. The same product can travel two ways: oil in drums or in bulk in a flexitank; corn in bags or loose in a ship's hold.

In international shipping, every commodity falls into one of five categories. This guide explains how each one moves, which documents and risks matter, and how to identify yours before you quote. The list of commodities in each one is on our cargo categories page.

The 5 categories at a glance

1. Containerized general cargo: FCL and LCL

This is packed cargo that fits in a standard container: electronics, apparel, auto parts, toys, furniture, tools. It travels on container ships with fixed schedules, and the same box moves from ship to rail to truck without anyone touching the goods.

The core decision is FCL or LCL:

• FCL (full container load): the container is yours alone, sealed at origin and opened at destination. Less handling and a fixed cost per container.
• LCL (less than container load): you share the container and pay for the space you use. It suits small volumes, in exchange for more hands on your cargo and the time it takes to consolidate and deconsolidate.

Our ocean freight team can run both options for your lane and show you where LCL stops making sense.

Documents: commercial invoice, packing list, bill of lading and the verified gross mass (VGM) the carrier requires before loading.

Typical mistakes:

• Calculating cubic meters only. Dense cargo, such as tile, metal or packaged liquids, reaches the container's or the road's weight limit before the box is full.
• Trusting that it "fits in a 20" without checking the door opening and the internal height.

2. Liquid bulk cargo

These are fluids that travel without individual packaging: vegetable oils, juice concentrates, liquid chemicals, lubricants, fuels. What changes is the scale:

• Tanker: for shipload-size lots, between terminals with pipelines and storage tanks. It is chartered by the voyage.
• ISO tank: a stainless steel tank inside a frame with the footprint of a 20' container. It travels on container ships, rail and truck. It works for food-grade liquids and for chemicals, including many classified as dangerous goods when the tank type is right.
• Flexitank: a single-use bladder fitted inside a 20' dry container. It is only for non-hazardous liquids: oils, juices, bulk wine, latex.

The rule of thumb: if your volume doesn't fill a ship, your liquid bulk travels containerized, in an ISO tank or a flexitank.

What matters in the operation: product compatibility with the tank; the cleanliness certificate and the previous cargo, which are decisive for food grade; whether the product needs heating to discharge; and whether the destination has a pump and a tank to receive it.

Documents: safety data sheet (SDS), certificate of analysis and, for dangerous goods, the declaration required by the IMDG Code. We cover it in shipping paints and chemical reagents.

Hydrocarbons: crude oil, refined products and liquefied natural gas are controlled goods. They move only on behalf of the authorized holder, with the permits the authorities require and with specialized operators. The permits always belong to the holder.

Typical mistakes: loading a dangerous product into a flexitank and not asking about the ISO tank's previous cargo.

3. Dry bulk cargo

Grain, sugar, fertilizer, ores, coal, scrap: loose cargo loaded straight into the hold of a bulk carrier, into rail hopper cars or into dump trucks.

There are no fixed schedules here: the ship is chartered for a voyage, with a date window to present for loading and an agreed time to load and discharge. If the port, the weather or your own product delays the operation, you pay vessel demurrage.

What matters in the operation:

• Weight. It is determined by a draft survey or by scale, and the invoice comes from that number.
• Moisture. Some ores and concentrates can behave like a liquid if they are loaded too wet. The International Maritime Organization's IMSBC Code requires the shipper to declare the moisture content and the transportable moisture limit.
• Plant health. Grain needs a phytosanitary certificate and, depending on the destination, fumigation.
• The terminal. The loading and discharge rate and the port's draft define what size of ship you can use.

What if your volume is small? Dry bulk also travels containerized: loose inside a container fitted with a liner bag, or in bulk bags. You pay more per ton, but you ship small lots on regular sailings.

4. Refrigerated or perishable cargo

Fresh and frozen foods, flowers, vaccines and biologic medicines. What defines this category is not the product but the temperature that has to be held from origin to destination, chilled or frozen, with a record that proves it.

The equipment changes by leg: a reefer container by ocean, a refrigerated trailer by road and, by air, thermal packaging or actively controlled containers.

What matters in the operation:

• A reefer holds temperature; it doesn't bring it down. The product must be loaded already cold.
• Setpoint, ventilation and humidity go in writing on the booking. An avocado, a frozen fish and a vaccine don't ask for the same thing.
• The points without power: the port yard, the customs inspection, the truck change. That's where the cold chain breaks.

Documents: on top of the commercial ones, phytosanitary or animal health certificates for food and the health permits that apply to medicines.

Ocean or air? What lasts weeks travels in an ocean reefer; what expires in days or is worth a lot per kilo flies. See our cold chain logistics service.

5. Oversized or project cargo

This is the piece that doesn't fit in a standard container because of its size or weight: heavy machinery, transformers, turbines, wind blades, structures, boats, aircraft.

Equipment options, from least to most specialized:

• Open top: a container with no rigid roof, for tall pieces loaded by crane.
• Flat rack: a platform with no side walls or roof. If the piece overhangs, it takes up neighboring slots on the ship and the carrier charges for them.
• Breakbulk or RoRo: the piece is lifted into the hold or onto the deck, or it rolls on.

On land, the critical leg is usually the road: lowboy or modular trailers, special transit permits when the piece exceeds the permitted weights and dimensions, restricted hours and, sometimes, escort vehicles.

What matters in the operation: a drawing with dimensions, weight, center of gravity and lifting points; the route survey; crane capacity at both ends; and insurance that covers handling and on-deck cargo.

Typical mistakes: giving catalog dimensions instead of the packed piece's, planning the ship before the ground route, and hiring the destination crane after the piece has arrived.

In this category we can point to our own cases: we have moved helicopters, yachts, machinery and the Sagem mobile phone production line. Read shipping helicopters and yachts and relocating a production line to Mexico.

How do you know which type of cargo you have?

Answer in this order:

1. Does it need a specific temperature? It's refrigerated cargo, whatever the packaging.
2. Does any piece exceed a container's internal dimensions or payload? It's oversized cargo.
3. Does it travel loose, with no packaging? It's bulk, liquid or dry. If the lot doesn't fill a ship, it's containerized bulk.
4. None of the above? It's containerized general cargo, and you still have to choose between FCL and LCL.

Two caveats:

• Dangerous goods are not a sixth category. They are a condition that sits on top of any of the five and changes packaging, documents and routes.
• The logistics category is not the tariff classification. The HS code defines duties and permits; the category defines how the cargo travels.

How cost and transit change by category

Every lane is different, but this is what drives price and time:

The mode of transport also depends on the category. According to IATA, less than 1% of world trade by volume travels by air, and about 35% by value: air is for high-value general cargo, perishables and urgent shipments, not for bulk. Ocean transit depends on the lane, the transshipments and port congestion, so ask for it as a range, not a fixed date.

How Kold Gold handles it

We work all five categories with ocean, air and ground freight, customs brokerage and cold chain. Before quoting, we tell you the category, the equipment and the mode that fit your cargo, and which permits fall to you as the holder. We operate in the world's busiest international ports and at every customs office in Mexico.

We speak your language: multilingual agents who coordinate with your supplier, the carrier, the terminal and you.

Browse the full cargo catalog or get a quote with our freight quote tool. Message us on WhatsApp or call +52 55 8897 4255 (Mexico) or +1 (619) 359-6567 (United States). You can also write to direccion@kold.gold.