The aeropress cylinder is made of polypropylene, and the plunger is silicone, https://aeropress.com/use-it-now/evolution-of-aeropress/ https://aeropress.com/use

The aeropress cylinder is made of polypropylene, and the plunger is silicone, https://aeropress.com/use-it-now/evolution-of-aeropress/ https://aeropress.com/use-it-now/evolution-of-aeropress/ I suspect that the stirring stick, filter cap, and funnel are made of HDPE.