PurposeThis paper aims to discuss multiple uses of the concept of “bubble” as a metaphor to refer to different experiences of foreign working communities and suggests a more flexible and comprehensive approach.Design/methodology/approachBased on ethnographic fieldwork conducted at different locations, the authors propose changing the use of the bubble metaphor from an analogy of living in isolation to a way of conceptualising the changing contexts and characteristics that impact the porosity and permeability of communities.FindingsThe paper suggests that when using the metaphor as a concept, the following considerations need to be taken into account: (1) the conventional thinking that “expat-bubbles” are isolated places, (2) any simplistic notion that different internationally mobile workers will be less or more immersed in the local community and (3) the use of the bubble metaphor without a careful delineation and reference to its permeability and porosity.Originality/valueThe paper helps to visualise a different dimension of the traditional taken-for-granted representation of the bubble. The bubble emerges as a rich analogical concept not to explain binomial representations of integration-separation. Rather than a simple “open” or “closed”, bubbles became more or less porous and permeable depending on the experiences of foreign working communities.