Enjoy summer-fun scents all season long (and beyond!) with this philosophy shampoo, bubble bath & shower gel four pack. How do I use it: As a shampoo, apply shower gel to wet scalp and hair. Lather, rinse, and repeat. As a shower gel, apply to wet body skin, and bubble up. Rinse clean. As a bubble bath, drizzle a generous amount under running water and enjoy. As a hand soap, pump onto hands and scrub under water for 20 seconds. From philosophy.