Soda is on the outs, and so, Pepsi is getting with the times. That means imitating La Croix and Deer Park by producing zero-calorie flavored water. It also means looking at how stressed out all of you are and slipping in a little something to take the edge off.

Driftwell is PepsiCo Inc.’s latest product. It’s blueberry-and-lavender-tinctured water laced with an amino acid called L-theanine. L-theanine shows up in some mushrooms and in green tea. Its advocates say it relieves stress and aids sleep.