Aside from the environmental impact, most dental floss is made from nylon (petroleum) and is coated with Teflon, a toxic substance linked to cancer (https://en.wikipedia.org/wiki/Oral-B_Glide)! OMG! There are many sustainable options available today made of silk which can be composted and the packaging is recyclable.
Bamboo toothbrushes are sustainable, compostable and anti-bacterial. When the brush reaches the end of it's life, pluck the nylon bristles out with pliers and discard and then compost the brush handle.
Help the environment, save money and eliminate unhealthy additives by making your own toothpaste! Super easy and you won't be contributing to the 900+ billion tubes of toothpaste that end up in the landfill every year.