Earlier quoted context omitted.
Tampons are made from cotton, not plastic. Maybe you're talking about the applicators (which are also sometimes made of cardboard instead of plastic)? Or maybe you're talking about menstrual pads, which - like diapers - have a plastic lining to protect against leaks.
To clarify, muzani mentioned jellyfish for tampons and sugar for plastics. Not plastic for tampons.
I did mean plastic for tampons. I simply quoted it from a quick google search for plastic replacements.