Forget London. Rio 2016 T-shirts on sale

This is Renata Santiago's third Olympics. And the main event for her isn't for another four years.

Santiago is part of the Rio 2016 team in London promoting the Brazilian city for the next Summer Games. She's been to the Athens and the Beijing Games as well, all to absorb knowledge for Rio's own two weeks in the global spotlight.

Rio will have had 2,499 days to prepare for their Games, from winning the bid in October, 2009, to opening day on Aug. 5, 2016: the Summer Games in the middle of their winter.

Casa Brasil, with daily exhibitions showcasing the country's culture, is a bit of Olympic future in the heart of the Olympic present in London. And, yes, there are mugs, T-shirts and onesies emblazoned with the special Rio2016 font created just for the next Games.

You can even buy letters with the unique font at the shop on the Thames.