Blim Plus is made of polypropylene, a very resistant plastic material, thermally insulated and easy to recycle because it is unique and does not need to be separated. Each piece is designed to potentially last indefinitely: just note the quality of the thicknesses or the absence of steps on the bottom of the objects, so as to facilitate thorough washing and prevent humidity from settling. If your environment is the most important, a healthier planet makes everyone happy.