The Colorado National Monument is turning to reusable water bottles to help the environment.

A spokesperson for the park said that a large percentage of waste on trails and roadways is attributed to single-use plastic water bottles. As a result the park has banned the sale of these water bottles. The move will also reduce the risk of park animals ingesting plastic.

There is currently one water fill station at the 32-square-mile park, and a second is to be installed shortly. Visitors are encouraged to bring their own reusable water bottles to the park. If they forget to bring one, there are reusable bottles available for purchase.

Colorado National Monument isn’t the only park to ban single-use water bottles in some form. To learn about the Grand Canyon ban, and our take on reusable water bottles becoming the norm, check out our blog from last summer.