This is much easier than the usual unflavored gelatin method. As for the leftover pudding mix, I use it in smoothies, milk shakes, fruit salads, more whipped cream, etc. It never goes to waste!You can make your whipped topping ahead of time and it won't separate or go runny! I find the pudding adds an extra richness to the flavor without being enough to know that it's instant pudding. You could use any flavor of instant pudding to change up the usual whipped cream flavors.