Intercontinental Hotels Group has announced its intention to remove miniature toiletries from its hotels, in a bid to reduce ocean plastic waste.

The decision, which will affect IHG's 843,000 rooms across the world, will come into effect by 2021. Already, a third of the company's rooms have implemented the change.

Miniature toiletries will be replaced by bulk items in all of IHG's hotels, including Holiday Inn, Crowne Plaza, and voco. Last year, IHG announced it would stop using plastic straws by the end of 2019.

"We collectively as an industry have to lead where governments are not necessarily giving the leadership to make a difference," said IHG chief executive Keith Barr. "Five years ago it was a tick-the-box exercise. Today it's follow-up meetings going through in detail what we are doing about our carbon footprint."

IHG hopes to reduce its carbon footprint per occupied room by 6 percent next year, whilst its high-end brand Six Senses is aiming to eliminate plastic entirely across its whole supply chain by 2022.