Only the good stuff! Unfortunately if you removed all silt (aka "sediment") from cold brew coffee, you wouldn't have all that much coffee left over...and what you did have left over wouldn't taste all that good! The silt is caused by tiny coffee particles sneaking through the holes in the filter. These particles are also found in traditional hot-brewed coffee, but you just don't notice them as much because the heat disperses the particles throughout the cup. They're still there, but you just end up drinking them. Cold brew's long-steeping process results in this silt sinking to the bottom. We've been warned by our cold brew expert advisors at Jittery John's that silt is a natural feature of cold brew coffee, and if you eliminated all of it, you wouldn't like the result!