A pousse-café is a term for a layered drink prepared by gently adding each ingredient from densest to least dense in order to create colored stripes when the drink is viewed from the side.
A pousse-café is a slightly more specific term for a layered drink. Like others of its kind, it is prepared by gently adding each ingredient from densest to least dense in order to create the appearance of colored stripes when the drink is viewed from the side.