Kitchen containers? Tin rejects (5,4)

I believe the answer is:

bread bins

I'm a little stuck... Click here to teach me more about this clue!

'kitchen containers?' is the definition.
'bread-bins' can be an answer for 'containers?' (bread-bin is a kind of container). I am not sure about the 'kitchen' bit.

'tin rejects' is the wordplay.
'tin' becomes 'bread' (I can't explain this - if you can you should believe this answer much more).
'rejects' becomes 'bins' (I've seen this before).
'bread'+'bins'='BREAD BINS'

Can you help me to learn more?

I've seen this clue in The Guardian.

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