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A. Can I have some Coke, please?
B. Can I have Coke, please?

C. Could you get me some water?
D. Could you get me water?

E. Have you got a lighter?
F. Have you got lighter?

G. Do you have an asparagus soup?
H. Do you have asparagus soup?

Questions:
1. Are the above highlighted articles/determiners always necessary to make the sentence gramatically correct?
2. Removing the articles/determiners, does it change the meaning?
3. Which of the above sentences sound natural?
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Comments  (Page 2) 
It is perfectly fine to say Can I have some coke? in that situation, but a native would probably say Can I have a coke?
Okay, I would just say, like natives do, the one with an article when in a similar situation. Thank you. Great help!
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