I've always liked making things from scratch - especially when i'm cooking. I enjoy the process; making it myself means that i control the quality and quantity of each ingredient. In the last couple of years, I've removed most pre-made cleaning and hygiene products from my life: I make my own shampoo, deodorant; toilet cleaner, kitchen cleaner; I also make my own toothpaste.
Making it yourself is cheaper, and you're not burdened by wasteful packaging. Chances are, you already have all of the ingredients at home to make it; there's really nothing to it. The recipe consists of: baking soda, foodgrade bamboo charcoal powder, coconut oil and peppermint oil (also food grade.) You can omit the bamboo charcoal to make your own toothpaste; it will work just as well. If you want black toothpaste to match your black-everything though, this is a must. If you want some, make sure to get it from a reliable source. If you're a hardcore minimalist, you can also brush your teeth with a simple 'baking soda and water' paste - though the saltiness can be overwhelming. Adding coconut and peppermint oil, makes for a better taste and texture. In colder climates, your toothpaste will solidify; scraping some onto your toothbrush can be a challenge. Put the jar near a heater for 5 minutes or so, to help soften it down.
Baking soda you can purchase in bulk; you can use to make a ton of products. I use it almost everyday on the boat: to polish metals, clean unclog drains etc. One day i will make a post about cleaning products, for now, enjoy the bamboo charcoal toothpaste recipe! Awaken the Ohaguro in you (be assured that the bamboo charcoal wont really stain your teeth.)
You can order your own bamboo charcoal powder from Taketora, it's where i got mine.