Marriott International, the world's largest hotel chain, said that it will eliminate small plastic bottles of shampoo, conditioner and bath gel from its hotel rooms worldwide by December 2020.
Instead, the hotel will switch to larger pump-action bottles that contain about 10-12 times the amount of shampoo, conditioner or bath gel.
These will be removed by staff when they run low and sent for recycling.
"Our guests are looking to us to make changes that will create a meaningful difference for the environment while not sacrificing the quality service and experience they expect from our hotels," said Arne Sorenson, the group's president and CEO.
Marriott has more than 7,000 hotels in 131 countries under 30 brands, ranging from SpringHill Suites and Residence Inn to Sheraton and Ritz-Carlton. It says it will be eliminating about 500 million small bottles each year, or 1.7 million pounds of plastic.
The move is an expansion of a policy that was first rolled out in January 2018 in the chain's economy brands.
In July 2018, it adopted a plan to remove plastic straws and stirrers from its hotels.
The move has been applauded by environmental activists. However, soon, hotels may not have a choice.
Lawmakers in California are considering banning hotels from using small shampoo bottles in 2023, while the European Union is banning a wide range of single-use plastic items, like cutlery and plates, by 2021.
An interactive map of Marriot Hotels in Ireland can be found here.