I Got Sunburned Despite Coppertone WaterBlast SPF 70

We took the fam to the beach, slathered everyone in that Coppertone WaterBlast SPF 70 stuff way ahead of time, like almost half an hour early as it states on the tube– did everything by the book, I mean. We were only out for like an hour and a half, even took breaks in the shade, at the end of the day, sunburn city for everyone…it did nothing at all if you ask me! We're all bright red and sore, so sore that my husband couldn’t lay on his back on the bed through the night, once I saw him opening the door of the refrigerator. we trusted Coppertone because of the high SPF and all that sporty stuff, I want to return this Coppertone, it’s not what I’m looking for, def need something more reliable next time. Sunburns are no fun!