Yeah, this is a LOT to spend on toothpaste. Not gonna lie. But I ran into this stuff in a little drugstore in London and I'm afraid I've been obsessed with it ever since. Glad there are places to buy it Stateside. I justify it by saying that it motivates me to brush my teeth more and for longer, which has to be cheaper than the dentist.
Birchbox, could you consider getting some of the more exotic flavors, like the jasmine or the licorice? Those are currently only available on Amazon. And one great thing is that you can actually eat after the non-mint ones and your food doesn't taste gross.