The counter 10本 is used for counting: 10 bottles/pencils (long/thin objects) (Category: 本 (hon) - Long/thin objects, JLPT N4). 十 (juu) contracts with 本 (hon) to form 'juppon' (historically also pronounced 'jippon').
Context Example
花を10本プレゼントした。
Hana o juppon purezento shita.
I gifted ten flowers.
Which counter represents "10 bottles/pencils (long/thin objects)"?
Correct! 🎉
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