Period Panties?

A few months ago, someone asked if any of us had special panties just for our periods.

That got me thinking... why not???  So I bought a package of plain white cotton Granny Panties and use those.  And because they're white, I can soak them in peroxide or bleach as necessary without "worrying" about ruining them.

Others have said that they like black/dark for that week because they don't show stray stains.

So do you have special period panties?  And special or regular, do you prefer light or dark?