Most outdoor plastic is PVC which is not susceptible to this. > with antimicrobial properties The Chlorine in PVC does that. In general PVC is used where you

Most outdoor plastic is PVC which is not susceptible to this. > with antimicrobial properties The Chlorine in PVC does that. In general PVC is used where you want the plastic permanently, and HDPE is used for disposable plastic (and is edible to microbes). So basically we are fine, and no need to change anything.