About Us

With a history of over 40 years, Williamson Manufacturing is a recognised supplier of quality plastic caps and dropper assemblies to the pharmaceutical and wholesale packaging industries in Australia , New Zealand and South East Asia . The steadfast commitment to quality and service to our customers has been an underlying principle contributing to the success of our business.

Our range of plastic caps include child resistant and "senior friendly" closures approved by the Therapeutic Goods Administration Australia. WILLSAFE™, WILLIAMSON 2000 SERIES and TAMPERDISC™ are our patented products.

We offer dropper assemblies of plastic stems with a choice of printed graduations and glass stems that include our popular bent range. We also offer options of child resistance or tamper-evidence.

By sourcing the best technology from around the world we aim to produce for the marketplace the highest possible quality products at a cost effective price.

From humble beginnings, the business has outgrown successive factories to be now located in a new purpose built factory and are proud to include leading pharmaceutical corporations in its customer base.


1966 After a decade of experience in the manufacture of glass vials for the pharmaceutical industry, Mr Vere Williamson establishes Williamson Mfg Pty Ltd and Williamson Plastics Pty Ltd to produce glass droppers and plastic caps primarily for pharmaceutical applications.
1971 Williamson & Co is added to the group of companies.
1985-1993 TGA Australia approves WILLSAFE™ child resistant caps range - first Australian designed child resistant closure to be approved.
1994 AS/NZS ISO9001:1994 certification
1996 TGA Australia approves TAMPERDISC child resistant and tamper evident range of caps.
1999 Business moves to new purpose built factory at Yagoona , New South Wales .
2001 TGA approves WILLIAMSON 2000 SERIES child resistant and "senior friendly" caps range.
2003 AS/NZS ISO9001:2000 certification  
Today All operations trade as Williamson Mfg Pty Ltd.  

Quality, Product Integrity, Service, Consistency

Our essence for continued growth and customer satisfaction.