So the question is “do smoothies keep overnight?” The answer is 100% of course! In fact, I usually make a huge batch of green smoothies in my Vitamix and it lasts for 2 days. No sense in chopping and making something that will last for one meal. Fill that thing up! Add enough spinach, kale or other greens and fruit such as apple, orange, pear, berries etc. so that it makes enough for several servings. Just add the lid of your Vitamix or other blender and put in the fridge when you are done. It’s that simple! It still tastes great the next day. And, it does not lose nutrients. Don’t go beyond day 2 though or it may start to taste not as good. But 2 days is very doable. Good luck! Oh and grab the free raw food smoothie guide here.