Café chain Boston Tea Party lost a quarter of a million pounds since it banned throwaway coffee cups last year.
The company took a major financial hit since it stopped selling single-use cups, instead requiring customers to bring their own or purchase reusable cups.
The founders of Bristol-based company, with 22 branches across the UK, say there are no regrets about the policy and they knew there would be some financial loss.
Co-founder and chief executive Sam Roberts said: “Someone’s got to take a stand. We don’t have a planet B.”
"It would be incredibly contradictory to change tack," he told Bristol Live . "As much as the loss is a painful amount of money to lose, at some point businesses have got to start prioritising the impact on the planet ahead of profits."
Boston Tea Party has lost 25 per cent of its takeaway coffee sales since implementing the ban, but says it has prevented 125,000 cups going to landfill.
But Sam doesn’t have concerns about the company’s long-term success, saying it's "only a matter of time" before Government brings in legislation to stop shops selling single use cups.
He added: "Anyone who ignores this is on borrowed time.
"We are dealing with this up front and we challenge other businesses in the sector to do the same.
"I am not worried about the long term. We truly believe we have acted in the right way and we are proud of that."
Customers visiting the café now have to bring in their own cup, buy a reusable cup sold at wholesale prices or pay a deposit to loan a cup, which they can bring back to any branch.
