They have a shelf life of months rather than days, for a long time than additional promotional commodities. Most artist ambassador: Katrina is business ambassador to top level products like Mango slice, Coke, Samsung, Veet, LG, Fevicol, Lakme, Fame Nakshatra, Spice Telecom and Pantene brand of shampoos. There is no pain involved as well as the effects aren't long-lasting.