I brewed my all-Mosaic IPA about a month and a half ago and I still have at least twenty half-liters left. I cracked one open last night and realized that the majority of the hop aroma and flavor has already left the building. I know hops will fade with time, but that fast? Should I focus on brewing smaller batches with IPAs (or making more friends) or is there something I can do to preserve the hoppiness longer?