Marathons are shifting away from disposable cups, reducing waste. Paris Marathon led the way by offering refill stations instead of cups. Runners refilled their reusable cups, reducing plastic waste.

The Chicago Marathon followed suit, introducing four refill stations. This change aims to make marathons greener. However, not all runners may adopt this method, especially those aiming for PRs. Read more gear coverage.

HydraPak's study and the Paris Marathon experience showed mixed results. While some runners found it smooth, others needed more education on self-filling. The New York City Marathon plans to add refill stations, continuing this trend. Related: Adidas Dominates Chicago Marathon with Super Shoes.

This original Runner World brief is based on reporting from Believe in the Run. Visit the source for its complete reporting, context and any later corrections.