Paris Marathon will make history Sunday as the first mass participation event to eliminate single-use cups and bottles, requiring runners to carry personal hydration containers. Organizers claim the sustainability measure won't affect performance despite divided reaction in the running community, with some competitors abandoning personal best attempts.

The controversial policy increases aid stations from eight to 13 and includes water spray systems for hot weather. Elite runners targeting sub-2:50 times can use pre-filled personal bottles, sparking criticism about fairness. Runners worry about hydration risks during potentially warm conditions if stations become crowded.

Representatives from London, New York, and Chicago marathons will observe the system, which aims to eliminate waste equivalent to 660,000 plastic bottles. Organizers hope this becomes a blueprint for future races, while sustainability advocates praise the bold move toward reducing environmental impact in mass participation events.