See the black line? That is how much sunscreen is left after using this spray-on product all spring and summer!! So, for a family of 5 living in southern California, this product from Rocky Mountain Sunscreen is well worth the price. The convenience of application is the reason I wanted to try this experiment. I will say, there was a lot of talk this summer about NOT applying this sunscreen near an open fire...highly flammable. Believe it or not, there were a couple of times when this rang clear for me...once while applying near a lit candle in the house and once when applying near a gas grill while on a camp out. Neither time resulted in any kind of harm, because I remembered last minute not to apply near an open flame.