I've seen these funny little coffee makers around but I never thought much about them until I read a great post over at Jerome's Bikes.
I've got a French press that I bought for camping, however this stove top espresso machine looks like it would be simpler to use in the field. After reading Jerome's blog post I ordered the 1 cup model through Amazon for $19.99 (check out the positive reviews of this product). It should work well with my Trangia stove. Be sure to watch Jerome's informative video, there's a link at the bottom of his post. Thanks for the recommendation Jerome.
