Drink in plastic container (4)

I believe the answer is:

asti

'drink' is the definition.
(Asti is a type of wine)

'in plastic container' is the wordplay.
'in' indicates a hidden word.
'ASTI' is hidden within 'plastic container'.

(Other definitions for asti that I've seen before include "It's a (anag) - wine" , "18" , "Italian product" , "Source of fizz" , "Piedmontese white wine" .)

I've seen this clue in The Guardian.

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