I freeze some bars lol. I also like the odd frozen muller light. The only other thing I do is... save my syns (most of them anyway) until the evening when the kids are all in bed, as I find that's the time I usually crack and want something nice.
I save my syns until i've got my baby off to sleep as well, I haven't ever frozen a Mullerlight though? Does it not get big chunks of ice in it like cheap ice cream?