For the first time ever, marathon runners will cover the entire 42.195-km course while carrying something in their hands: their own bottles.

Organizers of the Shonan International Marathon announced on Tuesday that the event will be an unprecedented trash-free competition.

The 15th edition of the race, which launched in 2007 and was held twice in 2008 and 2011, has been moved from Dec. 6 to Feb. 28, 2021, in response to the COVID-19 pandemic.