Bartlett Mitchell has prevented more than 500,000 coffee cups going to landfill, according to new figures announced in the company's annual CSER report.
The company was also able to save 370 metric tonnes of CO2 by implementing a policy banning team members from using disposable cups as part of its ‘Fruitful World' CSER programme.
This year Bartlett Mitchell became the only caterer that took part in a Cardiff University research project, which found that financial incentives, re-usable alternatives and clear messaging had a direct positive impact on customer behaviour.
Published for the second time, the CSER report also revealed the company reduced food waste by 7.5% in 2017 through its waste management strategy - exceeding its target by 2.5 percentage points. Waste at the business is now minimised, recycled or disposed of responsibly.
In addition, Bartlett Mitchell reported a 20% increase in coffee sales at every site the company sells its premium and sustainable coffee brand Perkee, which was launched in 2016 in partnership with beverage supplier Bewleys and the Soppexcca coffee co-operative in Nicaragua.
Wendy Bartlett, executive chairman of Bartlett Mitchell, commented: "The resolve to make a long-term difference that has been demonstrated by our team has been immense. I couldn't be more proud of the energy and determination to achieve these tremendous results.
"Last year our focus was on reducing waste and while we continue to improve in this area we have widened our attention to include social sustainability through our work with the Soppexcca coffee co-operative in Nicaragua. We have come a long way and produced positive and tangible outcomes. But there is plenty more to be done and we will continue to make every effort to use effective collaboration to drive meaningful change."
Commenting on Bartlett Mitchell's report, Andrew Stephen, chief executive of the Sustainable Restaurant Association, added: "Feeding thousands of people every day, caterers like Bartlett Mitchell have the power to change eating habits and to shape a better food future for all of us."
Bartlett Mitchell was the first contract caterer to achieve a company-wide top three-star SRA rating in 2014. Since then, it has been named as the most sustainable contract caterer by the SRA for three successive years.