I have ideas every 2nd day. Here is one: Your own highly individualized, probiotic and noncancerous toothpaste. Professionally attuned towards your taste/mood and hygienic needs. Send a cheek swab. Get the lab results. Taste the samples. Order your own mix. Colorize it. Share recipes online. Order retro toothpastes. Order bloody vampire toothpaste. Mix it at home. Put them on the blockchain. Make toothpaste fun again. Who wants to revolutionize toothpaste with me?!? Oh gawd, I can't stop.