Delta Coffee Press - GreyDelter Coffee Press Grey Meet the Delter Coffee Press, the first brewer engineered specifically to eliminate one of coffees biggest challenges: uncontrolled agitation. Excess agitation leads to bitterness and uneven extractionso Delter designed a better way. At the heart of the Delter is its innovative Jet Seal, a barrier that keeps water and coffee grounds separated until you apply pressure. This gives you precise control over how water meets the