The Porlex Grinder is a quality made in Japan grinder that fits nicely into your Aeropress making it a perfect companion when traveling to parallel worlds. Fully adjustable ceramic burrs ensure a perfect grind. Don’t be fooled by cheaper Chinese knock-offs, the Porlex sets the standard and will last a lifetime. At least your lifetime. There are certain dangers to traveling inter-dimensionally that may effect individual lifetimes. Most come back.