Every grinder -- no matter the price -- produces some fines and boulders. These two are the main culprits behind coffee that tastes both bitter and sour at the same time. The Shimmy Coffee Sieve removes both, leaving only the most uniform particles.
Place the Shimmy on your cup or portafilter. Add freshly ground coffee. Shake gently -- gently, like a lullaby. Fines fall through the mesh below, boulders stay on top. The middle portion is the gold standard -- even, clean, extracting beautifully.
If you use a mid-range grinder and always feel something is slightly off in your cup, the Shimmy might be the missing piece.
