A mother/daughter team came up with the DivaCup for your monthly uses. Here's their quotes from their website:
“Not every woman can afford a hybrid car nor easily convert their home to solar power. Yet, by choosing to use a menstrual cup instead of disposable tampons and pads, any woman is able to make an environmentally responsible choice each month. This is no small matter. In the U.S. alone, billions of tampons and pads are dumped into landfills and the environment each year.” Carinne Chambers
“With all the state-of-the-art conveniences Western society has developed, it baffles us why outdated feminine products are still being used. We believe that reusable menstrual cups are the next generation of feminine hygiene because they are the most environmentally responsible choice. They are also the most convenient and reliable option available and are not linked to Toxic Shock Syndrome.” Francine Chambers.
http://www.divacup.com/en/home/diva_cup/
Check it out and let me know if you've ever heard of this. I know you can buy them at Whole Foods and REI.