Bests & Worsts Reviews from Amazon

I have had the Hario Size 3 for three years and it holds size four filters nicely. This is the finest glass coffee dripper I have ever used. However, the exit hole at the bottom of the glass dripper is a full 3/4 inch hole so the coffee exits quickly. To brew the best cup of Joe with the Hario you must follow a few important steps and you will have the best cup of coffee you ever had. I use the tried and true method of Nick Cho the "Coffee Scientist". First, you MUST use a finer grind, like sugar, and then you must 'Wet the coffee". You see, when you introduce the coffee grounds to the hot water, the trapped CO2 in the ground bean must be able to escape and bubble out. The problem is that if carbon dioxide gas is going out, water isn't able to get in. So you must "Bloom" the coffee. As you start your pouring the water over the ground beans, you'll want to add just enough brewing water to wet all of the grounds and then stop pouring. Let the coffee absorb that water. Stop and let the gas escape for about 15 to 30 seconds. You'll see the bed of grounds swell and expand, resulting in what coffee professionals call a "bloom." That is when you can introduce the hot water to the grounds in earnest. Once the coffee grinds are fully wetted, the hot water will dissolve the solubles (also called solutes) in the beans' cells. Through "Diffusion" the cell wall structures of our coffee grounds are semi-permeable membranes, so the osmosis pressure drives the brew out of the highly concentrated chambers of the coffee grounds out to the more watery surrounding environment. Enjoy your Hario - the King of Coffee Drippers.