Plastic water bottle in the ocean

#OneLess - Because everything we do touches the ocean?

One Less

Visit the #OneLess website

The #OneLess campaign has been leading the charge against ocean plastic pollution since 2016, focusing on the pervasive single-use plastic water bottle. We are tackling plastic pollution at source, cultivating a fundamental change in the way Londoners drink water – from plastic water bottles, to refilling. Our vision is to transform London into a place where single-use bottled water is a thing of the past and where plastic waste is drastically reduced for the sake of the ocean.

Refilling from drinking fountain


Hello London, Goodbye Ocean Plastic iniative?

'Hello London, Goodbye Ocean Plastic' is a campaign to raise awareness about the alternatives to plastic bottled water in London and showcase the visionaries who provide them.?

We've teamed up with some of London's leading visitor attractions, popular destinations and events to encourage Londoners and tourists to drink water the London way and stop using plastic water bottles.?


artwork on bus shelter

#OneLess pioneer network?

The #OneLess pioneer network is a growing community of organisations leading the charge against ocean plastic pollution by taking action to reduce and eventually eliminate single-use plastic bottled water in London.

Pioneer network members gain access to #OneLess events specifically designed to help overcome challenges, whilst also connecting and learning from others.?

join the pioneer network?

People discussing in a group

London's drinking fountains?

In January 2018, #OneLess formed a partnership with the Mayor of London and fountain supplier MIW Water Cooler experts to install London's first modern day network of drinking fountains across the city. Since then, we've installed 28 drinking fountains across 11 London boroughs.?

The project has been a huge success, with the fountains dispensing enough water to save 155,000 single-use plastic water bottles in less than a year. The project has also inspired others to take action, including a commitment from the Mayor of London to install a further 100 drinking fountains across the city.?

download our guide to installing drinking fountains

Refilling from drinking fountain

Thames bottle monitoring programme

#OneLess is working with project partners and citizen scientists to deepen our understanding of the extent of plastic bottle pollution in the River Thames through our science based Thames bottle monitoring progrramme.?

Since April 2016, we have collected and removed more than 60,000 single-use plastic bottles from along the River Thames, of which nearly 50% of the categorised bottles were water bottles.?


Find out more in our report?

Person collecting bottles during a beach clean

#OneLess is hosted by the Zoological Society of London, in partnership with Forum for the Future, The International Programme on the State of the Ocean, and the Thames Estuary Partnership and is working with major London attractions and businesses, to find and implement solutions to eradicate plastic bottled water and enable a refill culture across our city

One Less project partners

Humboldt penguins investigate recycled plastic bottles at ZSL London Zoo
ZSL London and Whipsnade Zoos have removed all single-use plastic water bottles from its shelves, as part of the #...


People involved:?

Heather Koldewey,?Fiona Llewellyn, Rachel Shairp, Isabel Cotton, Alice Chamberlain and Charlotte Pike