I think you can say that smoothies are best consumed immediately after making it because it starts to oxidise then (meaning the nutrients are degrading - making it less nutritious). Although fresh is always best, just think - it's always better to chug a refrigerated smoothie than to have French Toast for breakfast.
I don't normally drink sugary stuff but I had to use this ginger ale in some form, so as not to waste it. Since I bought clams earlier that day and a lot of ginger, and the Filipino penchant of using sugary drinks as sauces/marinade (Sprite Prawns, anyone?) I used it as a base of the sauce for my seafood pasta.