The tea served to Britain's servicemen and women for nearly 90 years is to go on sale to help raise money for troops injured in Iraq and Afghanistan.
Naafi Break, created by the Navy, Army and Air Force Institutes (Naafi), will be available in 80 branches of Spar.
It is the first time the UK-made tea has been sold on the High Street.
Naafi, which supplies tea to troops in Afghanistan, said it would donate 50p from every box sold to the charity, Help the Heroes.
Naafi chief executive Reg Curtis said: "Our famous Naafi tea has been the beverage of choice for the British armed forces since 1921 and we are delighted to work with Spar to ensure it is widely available for everyone to enjoy for the first time in history."
The Naafi organisation was created by the British government in 1921 to run recreational establishments needed by the armed forces and sell goods to servicemen and women and their families.
It runs clubs, bars, shops, supermarkets, launderettes, restaurants and cafes at most British military bases and also canteens on board Royal Navy ships.