The Refillable Cocoflosser is designed specifically to be used with Cocofloss. The “jaws” of the Cocoflosser fit perfectly with our dispenser to make refilling super easy. Also, due to the thin width and slippery nature of most other floss, the Cocoflosser likely won’t be able to grip them as tightly, so they’ll slide out (and be less effective at removing plaque too).