What is this close-up picture? (WotsThat: Vinegar bottle glass texture (macro))

Question

What object is shown in this zoomed-in close-up photo?

CinnabarLine · Accepted Answer

Vinegar bottle glass texture (macro). Vinegar is made by letting bacteria convert alcohol into acetic acid, and the process is so ancient that traces of vinegar production have been found in pottery residue more than 5,000 years old.

Answer: Vinegar bottle glass texture (macro)

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