[mimixco]

Besides containing Teflon, those coated flosses just don't work as well.

[glennon]

For me, most dental floss shreds between one particularly irksome pair of teeth in my mouth. So Glide-style floss is the only type that works.

[mimixco]

I have that problem, too, but I'm not willing to put PTFE in my body over two crammed teeth. :-)