Beginning on Tuesday, tourists through San Francisco International Airport needed to prepare to cut a huge part of the pre-flight regimen: purchasing a huge water bottle to remain hydrated throughout the flight.

That’s because since August 20, San Francisco Airport prohibited the sale of single-use plastic water bottles, the very first recognized guideline of its kind at a significant United States airport.

The restriction, which uses to all suppliers in all locations of the airport, uses to any size non reusable bottle of water, though makes exceptions for flavored water and seltzer, together with other drinks like juice and soda.

Rather, the airport is using more than 100 “hydration stations” where tourists can fill recyclable water bottles prior to their flights– after they have actually gone through security. Shops at the airport will offer recyclable water bottles for tourists who do not have them.

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Shops can likewise continue to offer water in other product packaging. Hudson News stated that it prepares to “start offering drinks in glass bottles and aluminum cans,” according to the San Francisco Chronicle

“We’re the very first airport that we understand to execute this modification,” SFO representative Doug Yakel informed the Chronicle “We’re on the leading edge of the market, and we wish to press the limits of sustainability efforts.”

The restriction originates from a 2014 San Francisco city regulation prohibiting the sale of plastic water bottles on city-owned home. The guideline was not executed at the airport previously. It is the current stage of a more comprehensive strategy to cut the airport’s carbon emissions and energy utilize to no by 2021– that leaves out plane-related emissions and energy usage.

Prior to the restriction, suppliers in the airport offered around 10,000 water bottles every day and produced 28 million pounds of waste each year, according to Yakel.