Threading ice cubes onto a straw - Challenge

My wife was drinking a glass of soya bean milk with many ice cubes in it. The ice cubes were in cylindrical shape with a centre hole. She was trying to thread the ice cubes onto the straw. She managed to have 3 ice cubes. Suddenly, she challenged me to string as many as possible. I told her that it was easy but she did not believe.

I managed to thread 9 ice cubes onto the straw without my fingers touching the ice cubes. How did I do it?