Cocofloss has been the best floss I’ve ever used and really worth the extra $$ in my opinion. I find their website has better flavors than Amazon. And for someone with sensitive teeth, I also really like Opalescence Go for whitening and will sometimes get the 35% gel from my dentist to put in my retainers. She said any in office whitening is actually really gimmicky and this way I can maintain once every 2-4 weeks.