I cold brew - I bought a filter thingie ($8 on Amazon) and fill it half way with grounds and stick it in a mason jar with water, screw on top and it 'brews' in fridge. I then pour it into a plastic bottle and dilute it with water. Next round uses same grounds as before with another halfway up to top of filter thingie. When coffee in plastic bottle is gone, refill with coffee from 'brewer' and start process all over again. Tastes great! But then I use half and half in my coffee.....