Sucking ice cube during IV chemo to stop sore mouth

I had my chemo (4 AC) at the Westmead Cancer Centre in Sydney and they gave me an ice block/icy pole each time I started my chemo.  I seemed to get by without mouth ulcers, I still had a mouth tenderness and would easily cut inside my mouth when I had toast or something like that which would scratch up the inside of my mouth.  I was very fortunate not to get mouth ulcers although I expected them.