I've been making my own toothpaste for the past few months, and it works really well. It probably costs only a couple cents per batch to make. This gets you thinking about how much the price of things reflects the cost of the actual ingredients and not packaging, shipping, or advertising. Many store bought kinds have ingredients that are bad for your teeth- like glycerin, sweeteners, and SLS.
1/3C baking soda
1t sea salt
3T calcium carbonate powder (available in the supplements section)
1T coconut oil
5-10 drops peppermint essential oil
5 drops sweet orange essential oil
enough water to make a paste
Mix together powder ingredients.Warm coconut oil until liquidy and mix with the powder.Add enough water to make a paste. Add essential oils.
I make mouthwash that is 1/3 hydrogen peroxide, 2/3 water, and a drop of peppermint essential oil.