Might I reiterate the suggestion of my whole food version for people who don't wish to trust powders mixed by a stranger with a spotty track record of not-poisoning-himself?

I seriously don't think I can go back to not using this almost daily. Worrying about only 1 meal a day has been a huge stress gone from my life.

Edit: I've been googling round, looking at existing liquid meal replacements and I found this. This seems to basically be a multivitamin/multimineral + some whey and gelatin. it notably does not include things that are required but not generally listed as essential nutrients due to their ubiquity and some trace minerals are missing (sulfur for instance, Soylent ran into this issue as well). This is notably not a dietary replacement as it is only 110 calories. It is nonetheless interesting as an ingredient for attempts at homemade Soylent as it is quite cheap($1/serving). Whether the ingredients are bioavailable is of course a different matter, but Soylent has this issue as well.