It's easier to just guess when pouring one of these. The way you fill it is your choice, but the order is pyramid from largest to smallest, adding the extras afterward: White Z. first, then the Coke/Pepsi, then the Biaardi. Optional slice of strawberry or dallop of whipped cream. No need for mixing, watching the drink swirl (if you've done it right) is nice eye-candy for the prospective drinker who's next in line. The extras are just for kicks.