The espresso will still make you pee … just less often because there is less liquid to pee out … if you drink two or three cups of liquid, you’re more likely and more often will be going to the toilet.

If you drink an espresso, you got the hit of caffeine but there is less liquid in the system to want to flush out.

I spent several holidays in the south of Spain and they have about ten different types and amounts and concentrations of espresso. A Spanish breakfast is basically just an espresso and maybe a pastry because they want to be able to work all morning without a toilet break interrupting them. I learned early on from Spanish people that you can just drink an espresso and then go walking around a city for an hour or two without a break for anything for the toilet or even to eat because you’re so hopped up on caffeine (it acts as a hunger suppressant as well).

The opposite of that is Americano. I work in a bit of construction and renovation and before going to Europe, I’d fill myself with drip coffee and go to work … work for about an hour then have to take pee breaks. Nothing worse than being on top of a roof with all your gear, in middle of a ton of work and you have to head down to pee … only to do it again and again (it’s the main reason why you will often see construction workers peeing in a corner on the lawn or just out a window or into a gravel pit or use piss jugs around the job site).

Now I drink an espresso or two if I plan on working at a site for a few hours.