Hygiene is very important in a disaster situation, in a long term catastrophe or in a world without good insurance (Thanks Obamacare) taking care of your teeth will be much harder and much more important.
Products like mouthwash are also pretty expensive so being able to roll your own makes economic sense also.
I like this recipe because few ingredients are needed and the flavor is not horrible.
Also since it uses baking soda, it deodorizes your mouth (just like it does your fridge),instead of masking it with mint.
1 cup water
1 tb baking soda
5-8 drops peppermint/mint essential oil
Mix it, gargle it, and tell me what you think
* There are several species of the mentha arvensis perennial herb that can grow to 3 feet in height, spreading due to their underground 'runners'. Peppermint plant has hairy leaves with serrated edges and purple spiked flowers. Peppermint Japanese is known for its high menthol content. It is so high in fact that menthol crystals sometimes form right on the leaves.* Botanical Name: Mentha arvensis* Aromatic Aroma: Peppermint has strong minty notes with herbaceous warm undertones.* Consistency: Thin* Note: Top* Aroma Strength: Strong* Extraction Method: Steam Distilled* Plant Part: Herb* Origin: India* Color: Colorless to pale yellow* Common Uses: Organic Peppermint Oil has long been credited as being useful in combating stomach ailments. It is also viewed as an antispasmodic and antimicrobial agent. Of course, most people will associate it with being a flavoring or scenting agent in foods, beverages, skin and hair care products (where it has a cooling effect by constricting capillaries and helping with bruises and sore joints), as well as soaps and candles.* Blends Well With: Basil, Bergamot, Cedarwood, Eucalyptus, Lemon, Lime, Mandarin, Marjoram, Pine, Rosemary, Spearmint and Thyme.* History: Peppermint and its name has its roots in Greek mythology. Pluto - god of the dead - fell in love with Minthe, a beautiful nymph. Pluto's goddess wife Persephone became jealous and turned Minthe into a plant. Pluto could not bring her back to life but ensured that she would have a wonderful and fragrant aroma.* Cautions: Should be used well diluted since high concentration can cause a burning sensation and sensitization. Avoid use during pregnancy.