Apax Lab Mineral Concentrates - Nano Box SetUnlock every layer of your coffee! Your brewing water is one of the most important factors in making a tasty coffee, yet it's often overlooked. With APAX Labs Mineral Concentrates, not only can you create your own brewing water you can even "season" your coffee to elevate your brew after brewing! These mineral concentrates contain demineralized Water that has been stripped of dissolved minerals and impurities through ion exchange or reverse osmosis.