Review (4/5): Works well, but chemically
Each came individually wrapped in vacuum sealed plastic. When first opened they are moist and have a strong chemical smell and taste. They improved some when I let them air out. I also tried adding some essential oils to improve the flavor, which worked well. It does a good job of cleaning the teeth. I find scrubbing to be more effective than just chewing. My teeth feel like I just left the dentist, freshly polished. Overall I will keep using this or something similar, but it would be nice to know what chemical they use.