drinking cold water

Hi mummies, am in my last trimester now and i always have this habit of drinking cold drinks even before im pregnant alr…. Cold drinks as in ice water only not like sweet drinks etc. And ppl have been telling me not to but i just cant control bc nowadays the weather is very humid as well then i will tend to drink cold mineral water , and they say if i drink cold water my newborn will have phlegm and difficult to handle, Issit true or a myth ? Anyone also drink cold drinks during ur pregnancy and how ur baby turn out to be ? #advicepls