To mark its rebrand, Thayers, America’s best-selling facial toner, is hosting a pop-up in London that asks the question “WTF is a toner?!” and aims to promote its non-alcoholic Witch Hazel formula. The rebrand targets Gen Z and asks consumers to “own their skin”. The pop-up is created by Backlash and designed as a British telephone box that invites guests to step inside the phone box and dial 1847 (the…