Reliable Glass Bottles, Jars, Containers Manufacturer | Roetell

Case Study: Custom 700ml Glass Liquor Bottle for a Mexican Distillery

From Dented to Perfect: How Roetell Fixed Mexico’s 700ml Bottle Deformation

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Client Background

A premium Mexican distillery specializing in artisanal spirits approached us to develop a custom 700ml glass liquor bottle for their signature product. The client sought a sleek, modern design with a sturdy yet elegant structure to enhance their brand’s luxury appeal.

Challenge

After production, the bottles exhibited four inward-facing dents (concave deformations), compromising both aesthetics and structural integrity. The issue was identified in the early production batches, requiring immediate resolution to avoid delays in market launch.

Root Cause Analysis

Our engineering team conducted a thorough investigation and identified the following key factors:

  1. Mold Design & Cooling Imbalance
    1. The four-panel mold structure created uneven cooling, causing differential shrinkage and inward deformation.
    2. Insufficient venting led to vacuum pressure pulling the glass inward as it cooled.
  2. Glass Distribution & Thickness Variations
    1. The sidewalls were too thin in certain areas, making them susceptible to collapsing under atmospheric pressure during cooling.
    2. Inconsistent glass gob weight resulted in weak spots along the bottle’s body.
  3. Annealing (Stress Relief) Process Issues
    1. The annealing oven temperature curve was too aggressive, leading to rapid cooling and internal stress buildup.

Our Solution

  1. 1. Mold Redesign & Adjustments

    • Improved Venting: Added micro-venting channels along the mold seams to equalize pressure during cooling.

    • Optimized Cooling System: Adjusted cooling airflow to ensure uniform temperature distribution.

    • Reinforced Wall Thickness: Slightly increased sidewall thickness in critical areas while maintaining the bottle’s sleek profile.

    2. Process Optimization

    • Stable Gob Weight Control: Ensured consistent glass distribution by fine-tuning the feeder system.

    • Modified Annealing Cycle: Slowed down the cooling rate in the annealing oven to minimize residual stress.

    3. Rigorous Quality Control

    • Implemented automated optical inspection (AOI) to detect early signs of deformation.

    • Conducted pressure resistance tests to validate structural integrity before mass production.

Result

After implementing these adjustments:

✅ Eliminated inward dents – The final bottles maintained perfect shape with smooth, uniform surfaces.

✅ Enhanced durability – The optimized wall thickness and annealing process improved structural strength.

✅ Client satisfaction – The Mexican distillery praised our quick problem-solving and commitment to quality.

How We Do It

  • Tailored Engineering: Customized mold and process adjustments to address the specific deformation issue.
  • Collaborative Approach: Worked closely with the client to ensure the solution aligned with their brand standards.
  • Efficient Turnaround: Resolved the issue within two production trials, avoiding major delays.

“Roetell Glass not only fixed the deformation issue but also improved the bottle’s overall quality. Their expertise and responsiveness were outstanding!”

— Production Manager, Mexican Distillery

Reliable Glass Bottles, Jars, Containers Manufacturer | Roetell