Brewing Culture RDT Spray Bottle The Ross Droplet Technique (RDT) is a simple yet effective method for reducing static during the coffee grinding process, leading to a more precise and cleaner grind. A single spritz of water on your roasted coffee beans diffuses the static, resulting in less retention and a smoother grinding process. The outcome is a cleaner cup with enhanced flavour clarity. The BC RDT Spray Bottle is a must-have tool for coffee enthusiasts looking to optimise their espresso-making routine. Crafted from high-quality glass and metal, this 30ml spray bottle is compliant with the Europe Food Contact Directive, FDA, and ROHS standards, ensuring both safety and durability.