Currently I make coffee two ways: hot coffee using a moka pot, and cold brew using a Coffee Toddy. Both of these methods produce concentrated coffee. However, I've noticed that my liquid yield for cold brew using the Toddy is less than half that of the moka pot, even when you take the differing strength of the concentrates into account.
To put it another way: when making moka, 12oz of coffee lasts me about 12 days, whereas for Toddy cold brew, it only lasts me around 7 days. In fact, I can get a better cold coffee yield by making moka and pouring it over ice than I can doing cold brew -- but I don't want to go that way because it's so wasteful of energy.
I realize that cold brew will never have the extraction ratios of moka, but are there ways I can improve the yield for cold brew extraction, at least a little, without degrading the flavor? Either using my existing Toddy system, or some other system?