Yes on the pre-made smoothies! I often get ones made by Naked Juices (I especially like their berry/protein ones, which also have a lot of other vitamins and a lot of calories if you're trying to maintain your weight), Bolton Farms, and others--they're easy to get at the grocery store, and there are so many to choose from! My store often has them on sale for 2 for $5 or $6, and sometimes there are two-fers, so I try to stock up then. Just always remember to check the expiration dates.