One hundred request container for drink (4)

I believe the answer is:

cask

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'container for drink' is the definition.
I can't tell whether this defines the answer.

'one hundred request' is the wordplay.
'one hundred' becomes 'c' (Roman numeral).
'request' becomes 'ask' (to ask is to request something).
'c'+'ask'='CASK'

Can you help me to learn more?

(Other definitions for cask that I've seen before include "Measure" , "Keg" , "Cylinder for liquid" , "VAT?" , "Drink here" .)

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