It's the question when you want to drink something cold.You can say:
何か冷たいものが飲みたいです。
Nanika tsumetai monoga nomitai desu.
(In english, I would like to drink something cold(for drink) please)
Or
何か冷たいものをください。
Nanika tsumetaimono wo kudasai(In english, Please give me something cold(for drink))
And also you can say:
何か冷たいものはありますか。
Nanika tsumetai monowa arimasuka.(This one means, Do you have anything cold(for drink)?)
Question for this answer should be:
何か飲みますか。(Or 何か飲みませんか)
Nanika nomimasuka(Nanika nomimasenka)
(In english, would you like to drink something?)
Best of luck!