Whether you ship fine wines, delicate cosmetics or precision mechanical parts, every broken bottle chips away at your margins. Cardboard bottle dividers, also called casiers, slip neatly into your cartons to keep bottles from clinking together and risking breakage (or scratched labels). Popular across Europe for their light weight and practicality, these separators help you protect products, save on labour and meet your sustainability targets.
Key takeaway: Cardboard bottle dividers provide an economical, eco-friendly way to safeguard your fragile items without adding complexity to your packaging process.
How cardboard dividers work
Cell structure
Each divider features a grid of individual cells, creating a snug pocket for every bottle. Depending on your products, you can choose a grammage (paper weight) from 300 g/m² for light items up to 700 g/m² for heavier or ultra-fragile goods.
Assembly process
Most dividers arrive flat, ready for quick insertion into your carton on an assembly line (no manual gluing required). Once in place, they lock together to form a rigid internal frame, preventing bottles from shifting during handling or transit.
Protect your bottles effectively
Vibration and clink prevention
By separating bottles into individual compartments, dividers absorb shocks and prevent glass on glass contact. This design cuts the risk of breakage and reduces vibration-induced label damage.
Label and stock safety
Keeping each bottle isolated stops abrasive vibrations that can scuff or tear labels. If you ship wine, positioning the cork downward adds an extra layer of protection by keeping the seal moist and preventing air ingress.
Save on costs and time
Lower labour needs
Unlike foam inserts or custom moulds, cardboard dividers install in seconds without specialised tools. You’ll speed up packing lines and reduce handling errors, letting your team focus on value-added tasks.
Lightweight advantages
Cardboard adds minimal weight compared to plastic or wood alternatives. Lighter parcels mean lower shipping fees, especially when you’re handling high-volume or international shipments. You can also explore other separators like our cardboard box dividers to match your needs.
Customise and sustain packaging
Tailored dimensions and grammage
Leading manufacturers, such as Estic-Maillot (founded in 1924), offer fully customisable dividers—no tooling fees required. You share your box dimensions and bottle sizes, and they send samples for fit-testing before full production.
Recycled and recyclable materials
Most dividers are made from recycled cardboard and are fully recyclable after use. Good news, this is easier than it sounds—simply collapse and send them through your standard paper waste stream, supporting your circular-economy goals.
Quick recap and next step
- Understand how each cell holds bottles firm.
- Leverage dividers to prevent breakage and label abrasion.
- Cut labour and shipping costs with lightweight design.
- Customise size and strength without extra tooling.
- Embrace recycled materials for eco-friendly fulfilment.
Choose one pack style, order a sample, and test it with your next shipment. You’ll see how simple changes deliver big savings and peace of mind.
Frequently asked questions
What are cardboard bottle dividers?
They’re grid-style inserts made from cardboard, designed to separate individual bottles in a carton. You slot the divider inside before packing, and each bottle sits in its own compartment.
How do I choose the right grammage?
Pick a lower grammage (around 300 g/m²) for lightweight or less fragile items, and go up to 700 g/m² for heavier glass or especially delicate products. Your supplier can recommend the best option.
Are these dividers biodegradable?
Yes, most dividers use 100 % paper fibres and break down naturally in paper recycling streams. Avoid laminates if you need full biodegradability.
Can I pack non-bottle items with these separators?
Absolutely—dividers work for flasks, jars, electronic components and more. Just confirm cell dimensions match your products.
How do I test fit before full production?
Request free samples from your divider supplier. Place them in your cartons, load your bottles and run a short handling test. That way you’ll catch any sizing or strength issues before committing to a larger order.