An independent coffee chain is believed to be the first in the UK to ban the sale of hot drinks in disposable cups.
From 1 June, Boston Tea Party, which has 21 branches around England, will only sell hot drinks in reusable cups.
Customers must either bring their own mug, buy one in store or pay a deposit on one they can return to any branch.
Supermarket giant Waitrose has made a similar pledge to stop using disposable cups by autumn while Costa Coffee has vowed to improve on recycling.
Boston Tea Party owner Sam Roberts said that to carry on handing out 300,000 disposable cups a year was "senseless".