I use blender bottles and tend to keep 4 bottles of 500 calories in the fridge. So I might make anywhere from 0 to 4 bottles at night depending what I was at.
Why would someone make smaller batches? For a while I was making it up a pitcher at a time. I do not however consume 2,000 calories of soylent a day. Nor do I consume nice even numbers that divide into 2,000. Let’s say I consume 1000 calories Monday and 1500 calories Tuesday. If I make 2,000 calories up Sunday night and drink 1,000 on Monday that leaves me with 1,000 in the pitcher in the fridge going into Tuesday. How do I get the other 500?
What I did for a while was pour the remaining amount out of the pitcher into blender bottles and then make up a new pitcher but that seemed pretty ridiculous as I was washing not only the pitcher but also some blender bottles. So I just use the blender bottles alone now. With a nice “spoon” shaped scoop & scale it’s not that terrible to measure it out.