Do you have stains on your teeth from drinking coffee or smoking? Coconut oil whitestrips are so easy to use! They stay in place on your teeth (non-slip) without having a nasty taste in your mouth. I leave on for a little bit longer than the instructions say and have never experienced any problems. The box comes with 14 treatments, but you will see major improvements within just the first few treatments. I decided to use these because I quit smoking months ago and wanted to get my teeth whiter since I was no longer staining them from smoking.