Which floss brand do you find to be the best? Is there one you like to use for whitening?

I literally use any pick floss… A pack in my car, a pack in my drawer at work and a pack by my bed for just in case I forget. I don't look for whitening because I just buy the best priced. I can get a pack of oral b at the dollar store. And I have my water pick at home when I remember to use it. The more you care/floss/brush you automatically have whiter teeth. Everything is time.