
I just store mine in a tiny rubbermaid container and wet my toothbrush before using.
I know that essential oils seem to be a bit expensive, but in reality, the little 1 oz. bottle I have that I paid $5 for, will last me a long while, seeing as you only use a few drops per time. It's taken me over a year to use up a bottle.
I made my own toothpaste because it was fun and I wanted to try something different, but it's proved to be a great cost-saver too! Try it out, and let me know what you think!