
Bulk Packaging
We produce heavy-duty reusable bulk packaging for granules, powders and liquids which excels in the most demanding environments.
Manufactured using flexible thermoplastic fabrics and high-frequency welding, our bulk bags and tanks are perfect for transportation and storage.
Our bags are relied upon for in-process batch storage, long-term storage, short distance transportation and intercontinental shipping, alike.
Our relationship with humanitarian organisations have enabled us to develop a wide variety of flexible tank products for potable water distribution in times of crisis.
“Bulk bag technology has been the best solution for our needs. We’ve purchased bags from Structure-flex for a number of years and never any issues.”

Richard Phipps Wright's Bakery Factory Manager
Bespoke Big Bags
Manufactured from thermoplastic coated textiles, our big bags range from 500kg to 2,500kg and are designed with features which suit each specific application in terms of strength and compatibility.
The 'Original Big Bag'
Since 1970, the ‘Original Big Bag’ has provided exceptionally safe storage and transportation of bulk powders and granules.
It continues to be the first choice in challenging environments across the world, including oil & gas industries in the Middle East and Gulf of Mexico.
The Original Big Bag is available in various designs and capacities, ranging from 500kg to 2,500kg.
Operators have grown accustomed to its independently validated 8:1 safety factors and class-leading durability.
The UV resistant thermoplastic-coated textile and waterproof properties of the high-frequency welded construction makes it ideal for hygroscopic materials. This also makes it suitable for uncovered external storage, not possible with polypropylene FIBC bags.
Strap Bags
Strap Bags are designed to be used in similar applications to FIBC polypropylene bags – but with a far higher degree of customisation, stability and lifespan.
All seams are high-frequency welded to be dust and waterproof. The PVC coated textile offers excellent UV protection and is highly stable.
- Bespoke design and manufacture in all dimensions
- Rapid cost-effective prototyping
- Available with circular, rectangular or square body construction
- Conical or flat base to assist the emptying process
- Open top, skirt top or traditional inlet sleeve options
- Total discharge or traditional outlet sleeve options, including dust skirts
- Petal closures, sleeve shrouds, base protection/hygiene flap options
- PVC coated polyester lifting straps, with wear protectors
- Document wallets, sight widows and identification patch options available
- Available in over 50 colours for coding or to match corporate branding
- Easy to repair minor damage in the field
- UN Chapter 16 hazardous goods options
Ring Bags
Ring Bags are designed to be used with our bespoke hinged lifting ring and are suited to crane – or hoisted-based handling.
By eliminating traditional lifting straps, Ring Bags provide much longer in-field service.
- Bespoke design and manufacture in all dimensions
- Rapid cost-effective prototyping
- OEM lifting ring used to handle and manoeuvre
- Evenly distributed, secure, circumferential bag handling stress
- High-frequency welded to provide tight dust and waterproof seams
- Open top or traditional inlet sleeves options
- Available with circular body construction
- Conical or flat base to assist the emptying process
- Traditional outlet sleeve options, including dust skirts
- Petal closures, sleeve shrouds, base protection/hygiene flap
- Document wallets, sight widows and identification patch options available
- Available in over 50 colours for coding or to match corporate branding
- Easy to repair minor damage in the field
Baffle Bags
Baffle Bags incorporate a series of internal baffles, enabling the bag to retain a uniform shape and provide greater stability.
Baffles are introduced to square or rectangular bags and the number, location and shape can vary depending on application. Cut-outs promote even flow during emptying.
Bags containing semi-liquid or free-flowing contents benefit greatly because they are more stable during transportation. The ‘form-stable’ nature means they are well suited to warehouse storage, where dimensional stability (e.g. on pallets) is required.
- Bespoke design and manufacture in all dimensions
- Rapid cost-effective prototyping
- Limitless internal baffle configuration to ensure stability
- Open top, skirt top or traditional inlet sleeve options
- Available with rectangular or square body construction
- Conical or flat base to assist the emptying process
- Total discharge or traditional outlet sleeve options, including dust skirts
- Petal closures, sleeve shrouds, base protection/hygiene flap options
- PVC coated polyester lifting straps, with wear protectors
- High-frequency welded to provide tight dust and waterproof seams
- Document wallets, sight widows and identification patch options available
- Available in over 50 colours for coding or to match corporate branding.
- UN Chapter 16 hazardous goods options
- Easy to repair minor damage in the field
Large Tanks
We produce large pillow and open top tanks used internationally for projects as diverse as humanitarian aid, oil & gas exploration and cleaning solar panels!
Pillow Tanks
Known as pillow, bladder or lay-flat tanks, these bags remain an economical and ever-popular method of storing or transporting potable water, grey water, diesel and other fuels.
Supplied with 630gsm protective PVC groundsheet, they can be deployed on a variety of terrain and are widely used in humanitarian, fire-fighting, exploration, mining, military, agriculture and construction applications.
Relatively light and easily foldable, they can be transported to isolated places empty or truck-mounted when full.
- Capacities ranging from 500 litres to 250,000 litres
- Standard sizes or bespoke to suit individual requirements
- A variety of PVC and TPU coated technical textiles
- Range of aluminium / stainless steel skin fittings, and plastic bulkhead fittings for filling/empty from 0.5” BSP to 6” BSP
- 1″ to 4″ gate/butterfly and ball valves, incorporating camlock, guillemin or storz couplings
- 4″ access ports for dosing, complete with pressure relief valves to protect against overfilling
- Carrying valise with handles to enable ease-of-handling when setting out
- Repair kit (excluding adhesive) for small in-field repairs
Open Top Tanks
Our range of open top or ‘onion’ tanks are self-supporting, frame free and designed to be quickly and easily deployed and filled.
They are ideal for the humanitarian, fire-fighting, mining, military, agriculture and construction sectors.
They incorporate a foam or air filled collar, which rises as water is introduced. A protective top cover with securing ties prevents debris from falling in and protects water from UV light.
Very easy to clean, they can be used to store drinking, grey or waste water. They are often used to introduce treatment chemicals or as a settlement tank at the beginning of a filtration system.
- Capacities ranging from 500 litres to 100,000 litres
- Standard sizes or bespoke to suit individual requirements
- Produced in a variety of PVC and TPU coated technical textiles
- Range of metal and GRP bulkhead fittings for filling/empty
- 1″ to 4″ gate/butterfly and ball valves, incorporating camlock, guillemin or storz couplings
- Durable 630gsm protective PVC groundsheet to protect tank base
- Carrying valise with handles, to enable ease-of-handling when setting out
- Repair kit (excluding adhesive) for small in-field repairs
Bespoke Tanks
For applications that require a more custom approach, we can use our experience to design and manufacture a bespoke product, to create the desired solution.
- Bespoke capacity
- Bespoke geometry
- Bespoke materials and fittings









