Kosas Hotliner Hyaluronic Acid Contouring Lip Liner EPIC BNIB RRP £19 Dust off your dictionary, because the Hotliner Hyaluronic Acid Contouring Plumping Lip Liner (0.5g) from Kosas is here to redefine your lip routine (see what we did there?). Housed in a handy retractable stylus that gives this liner its signature smoothness (hello ultra-precise application), it boasts a formula enriched with a healthy dose of hyaluronic acid to lock in moisture for hydrated lips that appear plumper and defined. At the same time, an infusion of konjac root helps to protect your pout against environmental damage. Whether you're a sucker for sophisticated nudes or something a little more statement, make way for your new favourite lip combination.