Ticket to Ride Play Pink - Rules of Play says:
Ticket to Ride® Play Pink is a charity project in collaboration with The BCRF, to support research against breast cancer around the world, led by Days of Wonder and Asmodee. £2 will be donated to BCRF per set sold. The article includes a full set of trains that can be played with Ticket to Ride® and Ticket to Ride® Europe in a new and unique pink colour and a new shape wagons in a beautiful tin box.