These new, advanced capacity Black Ice crystals ensure a slower, steadier release of moisture, ensuring even greater humidity stability than before (65-70%). And here’s where the "oh-damn" moment happens. The patented Black Ice ‘Pie Jars’ separate into 4 equal-sized pieces, allowing for more proportional humidity distribution. Plus, they free up a ton of wasted space by fitting snugly in the corners of your humidor.