Reddit reviews Eco-Dent Gentlefloss Premium Dental Floss, mint menthe, 1 Count

I've also heard that waterpiks don't compare.

I have the same issue, and I think where I've arrived is that although plastic floss could end up somewhere where it harms animals, using silk floss definitely exploits and harms animals. I still hate sending my money to the plastic industry, but I guess its the lesser of two evils. Here's a good one that doesn't have too much packaging

Just make sure you take measures to dispose of it properly, like cutting it up so it can't get wrapped around any animals.

There's silk floss that usually comes in a refillable glass dispenser or if you're vegan they make a bamboo charcoal version and a (supposedly) biodegradable one made of corn.

Then a lower waste option is this German brand Doctors Floss that has a refillable metal dispenser or the Eco-Dent cardboard dispenser. Their floss is still nylon unfortunately which is why it's cheaper and comes with a lot more floss than the options above.