Interesting. I’ve been using mine to make 400 ml of coffee by adding water afterwards but this would be easier!

My recipe for those interested:

• Grind 30g beans to an espresso grind, put in press inverted
• Add as much water as you can
• Stir, steep three minutes
• Cap, flip, press
• Add hot water up to 400 ml

(I actually use a prismo attachment to avoid flipping)