Usage of お[冷]{ひや} ＆ お水


I just went out for lunch with a friend and when the waiter asked what we want
to drink, I ordered 'お[水]{みず}下さい' whereas I noticed my friend asked for
'お[冷]{ひや}下さい'.

Which expression would be more common or is there some distinction on who,
where or when to use either one?

よろしくお願いします




Both are used. お冷 is a bit more chic and it is only cold water (to drink)
while お水 is just _water_ in a general meaning.  
You will never be repressed for using お水 instead of お冷, vice versa.




Both are used. お冷 is a bit more chic and it is only cold water (to drink)
while お水 is just _water_ in a general meaning.  
You will never be repressed for using お水 instead of お冷, vice versa.

