I was looking for the bottle of wine which my brother gave me as a birthday gift when I saw my boyfriend asleep in the patio chair with an [empty bottle of wine/an empty wine bottle] [by/at] [his foot/feet].
Three questions
1Is there any difference between empty bottle of wine and an empty wine bottle?
2. Do both prepositions deliver the same meaning in this context?
3.Are both choices 'foot vs feet, acceptable and natural in this context?
Thanks in advance!