The Maely's Cosmetics B-Tight Lift & Firm Booty Mask ($49) moisturises with hyaluronic acid and stimulates the skin with caffeinated guarana seed extract to give your butt a temporarily smoother-looking appearance. It has a fluffy pink texture that absorbs onto the skin without any need to rinse. You'll know it's working when you feel the warming sensation from pink pepperslim in the formula, a concentrated oil made from pink berries.