Handcrafted Certified Oak Master® infusion closures

The Oak Master world is part of the Macaulay & Cumming Heritage Company. We are the licensed patent, design holder and world marketer of the OAK MASTER® Infusion Closures. We have the best closure provider and the highest grade quality of oak available. Our main provider GANGUTIA Toneleria selects the oak for uniform grain tightness and is aged outdoors to achieve maximum tannin reduction, proper moisture content and the development of complex wood compounds.


The wood used in the OAK MASTER® Infusion closures is naturally dried outdoors for 2-3 years in La Rioja, so there are less tannins, dry extracts and IPT. Due to the natural drying, the wood provides less amounts of coumarins, reducing bitterness. In addition it is proven that the level of contribution to the vanilla aromas is double than by artificial drying. This has the same effect to the eugenol levels. The natural drying method provides fewer lactones, but abundant cys-isomer, which are the ones that produce the smell.

PEFC (Certificate of Conformity Chain of Custody of Forest Products) and all this supports our commitment to the care and environmental sustainability atmosphere.

The toasting process is achieved by convection rotary ovens to obtain a more homogeneous and deep toasted range, quality that can not be obtained by traditional toasting methods.

"All OAK MASTER® Infusion closures are made manually and are assembled individually under patent license".

Handcrafted Certified Oak Master® infusion closures
Handcrafted Certified Oak Master® infusion closures

The OAK MASTER® LAB

Oak Master® LAB has been operating from 2017 under BRC IOP Global Standard Packaging application and processes. Our innovative infusion closures are manually assembled to perfection.

The OAK MASTER® LAB