WW2 weekly ration of sugar, tea, margarine, 'national butter', lard, eggs, bacon and cheese for an adult in the UK, WW2, 1942
(media.kbin.social)
Depends at what point during rationing, but it wouldn't be too hard to get coffee at all. And even then you had the lucrative black market. You would obviously be worse off than your peers who liked tea though.