Aeropress has an article that shows the evolution of its coffee maker over time.
Even though no BPA was leaching from the polycarbonate, we switched to copolyester in August 2009 so that we could assure people that the AeroPress was BPA free. Initially the copolyester was crystal clear. In September 2010 we added a smoky grey tint because our market research indicated that consumers liked the appearance.
It's a lot of fun to make coffee with the Aeropress -- you pour a little water in the piston and put it in the microwave for about 40 seconds. Then you put a microfilter in the cylinder (you get a "years supply" with the Aeropress) and a scoop of ground coffee. The you put the cylinder on top of a cup (the company recommends using a clear mug to make the process even more fun), pour the heated (not boiling -- it'll make the coffee bitter and sour, they say) water, stir for 10 seconds, and press the piston down. A few seconds later, you have a wonderful cup of silky smooth coffee.
Here's a video I shot in 2006 that shows how to use an Aeropress:
Rulof Maker used a salvaged motorcycle piston and cylinder, mounted in an Ikea lamp, to create a homebrew espresso machine, using a lever to pressurize water at temperature through a puck of coffee grounds.
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