Something I regularly interact with that’s typically considered to be disposable are plastic gloves.  I’ve had a couple of jobs working in the food industry and it’s something immediately that came to mind. The purposes of these are to protect the health of everyone, so that context matters, and makes it disposable. In terms of construction, it covers your hands fully to protect whatever’s on your hand from the public, and is usually supposed to be replaced every hour or two. This idea also connects to things like switching your cutting board after cutting meats, to later cut vegetables for cross contamination. I feel like also since it’s plastic we sometimes immediately think of disposable, or just things not meant to last or be permanent. The socialization of this also is due to the quality of plastic gloves since they are sometimes easy to break, but they’re not easy to degrade in relation to the environment.