"Drink cold drinks later get cough again"?

Way before I became a father, I always hear my visiting relatives, friends & colleagues who would tell their children off when their children were being offered cold icy soft drinks.

"Aiyoh, u drink cold drinks again, wait later got cough then u know."

I always thought that 1 small glass of cold icy drinks can't be that potent to immediately make the children "get cough". I was wrong.

I never get to fully understand their Kiasuism/over protectiveness concerns until recently. Master C who is now 2 years and 2 months old love "ice" drinks. And after drinking those icy cold drinks, some only with 1 -2 cubes of ice added, he will "get cough" a few hours later. And it normally surface at night time when the weather is cooler. And coughing children doesn't sleep well at night cos their niggling coughs disrupt their peaceful and much needed energy reviving rests.

And so Master C will not get any more cold icy drinks as far as we can avoid, until he grows older and stronger.