In the dog days of summer, the only thing my kids want to do is swim in the pool. Since we don’t have one at our house, I keep a bag packed with essentials that I can tote to a friend’s house, the health club, a public pool—basically wherever we can get some water time. I like products that do double duty so I carry less gear. And of course, I want them free of parabens, phthalates, synthetic fragrances and dyes, formaldehyde, petrochemicals and any other baddies I don’t have room to mention. That’s why this year, my swim essentials bag is packed by the The Honest Company, which just…