Big Guns Coffee, launched in 2021 by a father-daughter duo, uses a hydroponic farming technique to grow coffee. Their product is sold in hundreds of stores in the U.S.

I can pop a pod in and make a latte that tastes EXACTLY like the one I was getting at a little over 1/5 of the cost!” says one reviewer.

It’s practically a rite of passage for the best coffee machines to get the 'mini' treatment – first came Nespresso with the ...