I've been using Tom's of Maine toothpaste which I like, but there is still an empty tube to deal with. Can't burn it, Can't compost it, Can't recycle it. I'd like to make up something of my own. I've been experimenting with a combo of baking soda, peroxide, and some drops of tea tree oil and peppermint oil. I'm not completely happy with this yet. I can't seem to get past the baking soda taste. Perhaps some type of sweetener? Maybe honey? Any suggestions?