The Best Plastic-Free Dental Floss (2026)

Conventional floss is a small piece of plastic you throw away every single day: nylon thread, petroleum wax, a plastic dispenser, and often a slick PTFE coating in the same chemical family as the nonstick compounds we avoid in cookware. The plastic-free alternatives have gotten good enough that there is no reason to keep buying the old kind. Here are the three we recommend.

Floss	Material	Vegan	Refill system	Where to buy
EcoRoots Bamboo Floss	Bamboo fiber + charcoal, candelilla wax	Yes	Glass bottle + refills	EcoRoots
Treebird Silk Floss	Mulberry silk, home compostable	No	Glass jar + refills	Amazon
Dental Lace	Silk, the original refillable	No	Glass dispenser + refills	Amazon

Why Regular Floss Is a Problem

Floss seems too small to matter until you do the math: a strand a day, per person, sealed in a plastic dispenser that gets replaced every couple of months. None of it is recyclable, and nylon thread takes decades to break down. The bigger concern is the coating. Many big-brand flosses glide because they are coated with PTFE, and researchers have flagged coated floss as a possible source of PFAS exposure. Your mouth is a strange place to accept that trade for slightly less friction.

The Picks

EcoRoots Bamboo Floss: Best Overall

Bamboo and charcoal fiber with candelilla wax in a refillable glass bottle, and the only fully vegan pick of the three. It is slightly thicker than conventional floss, which most people end up preferring once they adjust, and refills come in paper. EcoRoots ships everything plastic-free, and our bathroom guide covers the rest of their range.

Treebird Silk Floss: Best Glide

Mulberry silk floss in a tiny glass jar with a metal cap. Silk is the closest natural match for the feel of conventional floss, smooth and thin, and the used strand can go straight into home compost. Not vegan, which is the one trade-off, but for anyone who quit a previous natural floss because it felt like twine, this is the one to try.

Dental Lace: The Original Refillable

Dental Lace more or less invented the refillable floss category, and the product holds up: silk floss in a small glass dispenser with looks nice enough to leave on the counter, plus inexpensive refill spools. Functionally similar to Treebird; pick whichever design you prefer or whichever is in stock.

Silk or Bamboo Fiber?

Silk wins on feel and home compostability; bamboo and corn-fiber flosses win on being vegan. Both handle the actual job fine. If you compost at home, silk disappears into the bin within months. If animal products are a no, EcoRoots’ bamboo fiber is the answer. There is no wrong choice here, only a preference, and either one ends the daily plastic habit. Pair it with toothpaste tablets and the whole dental routine goes plastic-free.

Frequently Asked Questions

Is silk floss compostable?

Yes, at home. Silk is a natural protein fiber that breaks down in a backyard compost bin within a few months. The glass jars and paper refill packaging are recyclable or reusable.

Does charcoal floss whiten teeth?

There is no strong evidence that charcoal in floss whitens teeth. Treat the charcoal as cosmetic; the reason to buy bamboo charcoal floss is the plastic-free material, not a whitening effect.

Is bamboo floss vegan?

Yes. Bamboo and corn-fiber flosses use plant fiber and plant-based wax (usually candelilla), with no animal products. Silk floss is not vegan since silk comes from silkworms.

How long does a floss refill last?

A standard 30-meter spool lasts about a month of daily flossing. Refill multi-packs bring the per-month cost close to what conventional floss runs, without the plastic dispenser each time.