I've never used that myself so I can't be of help but I found this interesting site on feminine products....They are re-usable......
Reusable Menstrual Products | GladRags.com
Once in a while I used to find a panty liner in the dryer that accidently was left in my clothes and I joked that I was rewashing them, I never thought someone actually made them....Darn, I guess I lost out on another money making idea!