Mum, child rattle container (5,3)

I believe the answer is:

mason jar

'container' is the definition.
(Mason jar is an example)

'mum child rattle' is the wordplay.
'mum' becomes 'ma' (both can mean mother).
'child' becomes 'son' (male child).
'rattle' becomes 'jar' (I've seen this in another clue).
'ma'+'son'+'jar'='MASON JAR'

I've seen this clue in The Everyman puzzle in The Observer.

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