I see previous reviewers say it doesn't work in bigger gaps. I would disagree, it does do that but you have to wiggle it a bit, just as you would need to do with a normal piece of floss.

Perhaps what is more concerning here is the amount of material used to create it, you got the little bamboo part (lets not get started here where it comes from and the amount of CO2, etc. etc. I know) and a little bit of floss.

My dentist simply takes a piece of long floss string and works her way through my teeth for the clean-up. I know these little sticks are more convenient, but I eventually got used to the other old-school method. I also bought from PlasticFree Amsterdam this little guy from GeoOrganics in a tiny cute glass jar, and I am happy with it:
https://www.plasticfreeamsterdam.com/collections/dental-care-1/products/natural-floss-activated-charcoal

I honestly didn't like using this floss picks. It removes stain, but not in bigger gaps. I don't like the way I need to hold it, very uncomfortable. It's okay, maybe not the perfect product for me. I'm using floss now, which is better for me.

The dental floss picks are very good, no difference than the regular ones except they are environmental friendly. They do the job as good as other plastic dental floss. Very satisfied with the overall product and I would recommend it as an environmental friendly good product.