How long can I keep espresso in the fridge? I often make espresso with a bialetti moka. I made some espresso martinis for my family at a party earlier this year and I have been asked for some more over Christmas.

How long can I keep espresso coffee made with a bialetti in the fridge? If it can be stored for a long time, can I top it up with more coffee as I make it, or should each batch be stored separately?
I don't know for sure how long you can keep it in the refrigerator, but it should be essentially indefinite in the freezer. You could freeze it in ice cube trays, then when the cubes are set, transfer them to a plastic bag for easy storage and access. You could even make each cube the right amount for a single drink.