Etched with the iconic bus, the wooden holders are £19.95, but you have the chance to get your mitts on one. Look out for the poster below (apparently they're all over London), get a picture of you standing in front to it, send to London Design Festival, tell them where you took it and they'll give a holder to their two favourites.
You've got until Sunday 26th September to get snapping. Full details are here. Good luck!