Each session usually lasts 15 - 20 minutes. Treatments should be placed 4 - 8 weeks apart to allow your body to remove the maximum amount of pigment cells. You will continue to see a lightening of your lesion after each treatment as your body disposes of the pigment cells.
Definition of soda pop. : a beverage consisting of soda water, flavoring, and a sweet syrup.
The sparkling part is carbon dioxide. If it's just sparkling water, then no it's not pop. It's just fizzy water. If it has added sugar or artificial sweeteners and flavourings then it would be similar to pop. I suppose it depends what aspect of pop you're trying to give up - sugar, artificial additives or bubbles.