P&O Cruises and Cunard stated an intention to remove single use plastics from their ships' hotel operation by the end of 2022 as part of an overall environmental compliance plan.
The pledge came after the boss of rival Royal Caribbean, Michael Bayley, announced that plastic use is to be reduced across all brands of the company, including Celebrity and Azamara Club Cruises.
The move follows the raising of awareness of the problem due to programmes like BBC's Blue Planet.
According to Carnival UK president, Josh Weinstein, they needed "to go to the source of the supply chain to encourage changes to packaging and remove single use plastic products from hotel operation."
He added they were in discussions with their suppliers to try to influence the single use plastic's removal in products like straws, food packaging and water bottles wherever possible, as well as reviewing their wider sourcing strategy concerning the most environmentally friendly products.
The 2nd XL class cruise ship for P&O, which is fully powered by LNG (liquefied natural gas) and one of the world's most environmentally advanced ships, and the new Cunard cruise ship will be launched in 2022 so the intention goes even further in lines' ongoing quest for environmental protection.