Hello Alan-I purchased your On The Go and I love really strong espresso coffee-what is the best ratio for coffee and heated water? Thank You! – From Gerry G.

One scoop of grind and fill hot water to the [1] on the chamber produces a single espresso-strength shot. A double shot is made with two scoops of grind and fill hot water to [2] on the chamber. If you want it more concentrated, try two scoops of grind and water filled to between [1] and [2] on the chamber. Alan