Noun
A lawyer's bag made of blue fabric to carry briefs, now as typically carried by a junior barrister. [from 18th c.]
A bag containing alkaline blue laundry powder, used for whitening clothes. [from 19th c.]
Source: en.wiktionary.orgFrom 1995 to 2008, the city had a blue bag program to divert recyclable refuse from landfills. citation Because of low participation in the blue bag programs, the city began a pilot program for blue bin recycling like other cities. Source: Internet
I was a teenager when I found a forgotten blue bag behind an infrequently used door. Source: Internet
I paired it with this blue bag that Big Buddha sent me a few years ago and added these white sandals that I got in Seattle a few weeks ago. Source: Internet