From the Super Mario Wiki
Teeheespresso is a type of coffee that can be brewed in the Starbeans Cafe from Mario & Luigi: Superstar Saga and its remake. The name of this item, as well as that in several other languages, is derived from the Espresso type of coffee, known for being very concentrated and having a higher caffeine amount than other drinks. The coffee blend requires 15 Woo Beans and 10 Hee Beans (6 and 4 in the remake respectively). If Mario or Luigi drinks the item, he receive a permanent 6 point boost (3 in the remake) to a random stat, making this drink have the greatest effect on stats out of all drinks.
Names in other languages