MJ Plastic
Bottle and Jar Manufacturer (An ISO 9001:2015 Company)

Quality » Design and Engineering


The Design and Engineering team at MJ Plastic understands your need for speed. And we know the timely launch of your custom package requires we do it right the first time. To that end, we’ve built our design and engineering process to eliminate obstacles, reduce steps and run a thorough but quick first-stage production.


MJ Plastic Improves Service from Many Angles:


We can expertly handle your needs for custom HDPE bottles made from the extrusion blow molding process. MJ Plastic has many molds and our design and engineering team is intimately familiar with the properties of these molds. When you work with MJ for a custom design, our team can make recommendations for which existing molds to utilize – or we can give you a custom molds that precisely meets your needs.


We understand the complexity of designing a high-caliber blow mold – one that will provide even distribution of plastic, optimal cycle time and efficient design in relation to a complete tooling for production. We will always apply our knowledge of our platforms to arrive at the most efficient and cost-effective solution.

Professional Design Services

MJ offers everything from simple design to consumer-driven structural and industrial design services. We can truly take your idea “from art to part” with an efficient and intelligent design process.

Integrated Data

Our CAD and CAM software are integrated, so no data are lost in translating from design to manufacturing programs. And, if duplicate mold sets are required to satisfy your volumes, we have invested in sophisticated, automated CAM systems to insure precise replication of multi-cavity tooling sets.

In-House Tooling

We make the vast majority of both unit cavity and full production tooling in-house. This allows us better control over our quality and timing of new molds, and it enables you to be actively engaged in each step of the design and engineering process. If we cannot accommodate your timeframe with in-house resources, or if your project falls outside our core competencies, we have a trusted network of toolmakers who can expedite your project.

Adherence to Specifications

Every component we manufacture must conform to our rigid manufacturing specifications. Our standards apply while preparing our equipment for production and continuously during the process. Our specifications ensure compliance to yours