Education Champions – Youth Activists – Knowledge on Plastics Do you know how long it takes for the different plastic materials to decay and where they go?The truth is plastic doesn’t decay. They just turn into tiny particles. Duration for decomposing varies based on the type of plastic.Cigarette butts: 10-12 yearsPlastic bags: 10-20 yearsCoffee cups: 30 yearsFoam cups: 50 yearsPlastic bottles: 450 yearsPlastic diapers: 500 years Feel free to share this page