SO expensive for a toothpaste but the flavor is divine. I'm serious about...

SO expensive for a toothpaste but the flavor is divine. I'm serious about dental hygiene but have never before come across a toothpaste that made me look forward to brushing like this one. Not sure what is "aquatic" about this flavor, but I do find it delicate, unique, and refreshing without being overly minty/stinging. This contains fluoride which is important to me. One possible con: I've had canker sores on the inside of my bottom lip lately, which may be due to the formula including SLS or may be due to stress. I'll see how the next months of using it goes, but hopefully the canker sores are indeed stress-related and I don't have to discontinue use of this delightful toothpaste.