Great Floss Without Fluoride
I've been using Dental Lace for several years and am very pleased with it.  I especially like that Dental Lace is free from fluoride, unlike others flosses.  I have had to purchase two new bottles (because I lost mine), however, and from those extra purchases I can say that sometimes the lid might need a little adjustment.  On one of mine, the lip part that you use to cut the floss was a bit too flat against the bottle, thus making it made it difficult for me to wrap the floss around it.  But I used tweezers to pull the lip up slightly, and that fixed it completely.
Rating: 5 stars