Client Background
Minghang, being a professional hot sauce bottle vendor, was contacted by a Spain, based hot sauce brand that is famous for premium chili blends and their products are sold all over Europe. The brand was looking for a trustworthy hot sauce bottle vendor to enhance the user experience and decrease the number of complaints after opening. They designed long, thin bottles for hot sauce made of very clear flint glass, which included a precision, pour neck, a tapered shoulder, and the possibility to be matched with flow, control inserts and screw caps. The client decided on Minghang because of our expertise in functional bottle design, strong mold engineering, and a solid record of liquid, control problem, solving.
Challenge
Dripping After Pouring
Final consumers complained that the bottle neck would drip with sauce after filling, and this would lead to creating messes and wastages.
Inconsistent Pour Control
The flow rates of different filling batches were not equal, which influenced consumer perceptions and brand quality.

Cause Analysis
The technical department of Minghang performed pour tests, structural examination and determined the essence of the issues:
- The inside neck was too smooth and the sauce stuck and clung back.
- The depth of the mouth of the bottle was not a perfect fit to the chosen flow restrictor, which decreased efficiency.
Solution
Neck Geometry Redesign
We turned in the inner lip angle and put in a micro-drip edge to cut the flow of liquids after pouring.
Optimization of Component Compatibility.
The Minghang confirmed the mouth tolerances and experimented on various options of the insert to provide a stable flow across all batches.
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| Custom 8oz Clear Glass Bottles for Hot Sauce | Custom 100ml 150ml 250ml Square Empty Hot Sauce Bottles |
Result
The number of dripping problems decreased by more than 80 percent, complaints by consumers declined and repeat orders were made. The Spanish brand has made its packaging performance to an advantageous level, which has consolidated its market performance and established Minghang as a credible long-term hot sauce bottle supplier partner.
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