Lab bottle (5)

I believe the answer is:

flask

'lab bottle' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for flask that I've seen before include "Portable drink container" , "Container for liquids" , "Small pocket bottle" , "Glass container" .)

I've seen this clue in the Thinks.com, the Universal, the Newsday, the New York Times, the USA Today, the Family Time and the King Feature Syndicate.

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