The main types of shipping containers solve different cargo problems. A dry box suits cartons and palletised goods. A reefer manages temperature. An open top or flat rack gives access for cargo that cannot pass through standard doors. A tank container carries compatible bulk liquids within a specialist frame.
Choosing by name alone is risky. Buyers should confirm the cargo dimensions and weight, loading method, route, handling equipment, securing plan and the actual specification of the allocated unit.
Shipping container types compared
| Type | Main feature | Typical cargo | Planning question |
|---|---|---|---|
| Dry container | Enclosed general-purpose box | Cartons, pallets, packaged goods and components | Will the cargo fit through the doors and be secured inside? |
| High cube | About 305mm taller than a standard dry box | Light, bulky goods, furniture and high-volume loads | Does the extra road height affect the route or site? |
| Reefer | Temperature-control machinery and insulated body | Food, produce, pharmaceuticals and other controlled cargo | Who sets, powers and monitors the unit? |
| Open top | Removable roof cover for top loading | Tall machinery, stone, glass and awkward cargo | Is the cargo out of gauge and properly protected and secured? |
| Flat rack | End walls with no full side walls or roof | Machinery, vehicles, steel, boats and project cargo | What are the exact over-width, over-height and securing requirements? |
| Tank container | Pressure vessel within an ISO frame | Compatible food-grade or chemical liquids and gases | What product classification, cleaning and discharge controls apply? |
| Side-opening | Doors along one long side | Long pallets, timber and awkward goods | Is side access available at every handling point? |
Standard dry containers
Dry containers are the default choice for weather-protected general cargo. Standard 20ft and 40ft units share a nominal 8ft width, while their internal measurements and payloads vary. Cargo still needs suitable packing, weight distribution and restraint. See the shipping container dimensions guide for typical measurements.
High-cube containers
High cubes provide more internal height and volume. They suit cargo that fills the box by cube before reaching the weight limit. The extra height can matter on the road and at low canopies, so provide the full loaded height when requesting container transport.
Reefer containers
A reefer is an active temperature-controlled unit, not simply an insulated box. The parties responsible for the shipment should agree the set point, permissible range, ventilation settings where relevant, pre-trip inspection, power during each stage, monitoring and response to alarms. A refrigeration unit cannot correct cargo that was loaded at the wrong temperature.
Open-top containers
An open top allows cargo to be lowered by crane. It normally uses removable roof bows and a weather cover. Cargo extending above the standard profile becomes out of gauge and can change vessel slots, terminal handling and road movement. Give the final packed height, lifting method and cover arrangement.
Flat-rack containers
Flat racks carry loads that cannot fit inside a box, including heavy machinery and project cargo. They expose the load and rely on a suitable securing design. Exact length, width, height, weight, centre of gravity, lifting points and restraint details are essential. Road legs may overlap with heavy haulage or abnormal-load planning.
Tank containers
A tank container places a specialist vessel inside a standard handling frame. Product compatibility, dangerous-goods classification, pressure, temperature, cleaning history, seals and loading or discharge equipment all matter. Use a provider with the correct tank and product expertise; a general dry-container haulier is not automatically suitable.
Side-opening and other specialist containers
Side-opening containers can simplify forklift access to long or awkward cargo, but the doors need working space along the side. Other types include double-door, ventilated, insulated, bulk and platform units. Availability is not universal, so confirm equipment early.
Safety markings and verified weight
The International Convention for Safe Containers (CSC) provides the approval framework for most freight containers used internationally. Check the Safety Approval Plate and current condition. For packed containers entering sea transport, the shipper must also provide verified gross mass in line with SOLAS requirements.
Details to give a transport provider
- Container size, type, number and owner.
- Cargo description, package method and gross weight.
- Exact out-of-gauge dimensions where relevant.
- Loading, lifting, securing and discharge method.
- Temperature, hazardous-goods or contamination controls.
- Port, depot, collection and delivery locations.
- Site access, timing and empty-return instructions.
Frequently asked questions about Types of Shipping Containers
What is the most common type of shipping container?
The enclosed general-purpose dry container is the most common. Standard 20ft and 40ft versions carry packaged, palletised and boxed cargo.
What is the difference between a standard and high-cube container?
A high cube is typically about 305mm taller, giving more internal height and volume. The extra road height may affect routes and site access.
Is a reefer just an insulated container?
No. A reefer has active temperature-control machinery. Power, set point, monitoring, ventilation and alarm response must be agreed.
When is an open-top container used?
It is used when cargo needs overhead loading or is too tall for standard doors. Out-of-gauge cargo needs extra handling and transport planning.
What is a flat-rack container used for?
Flat racks carry machinery, vehicles, steel and other cargo that is too wide, tall or awkward for an enclosed box. Precise dimensions and a securing plan are essential.
Are all container types available from every haulier?
No. Equipment, trailers, handling facilities and cargo acceptance vary. Confirm the specific container and operating capability before booking.
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