What flavour fizzy drink do you have with icecream in a spider?

Oh you always have to have red creaming soda with a spider! I haven't had one since I was a child, thats it, on the weekend, I am going to make myself and my children all a 'spider' and we will celebrate what mummy used to do as a child! I used to love when the foam on the top rose up so far that it spilt all over the edges of the cup and onto the table, I now understand why my mother looked so cross about it! - what a mess!