That's quite a chunk of change for rebranding SlimFast for the urban millennial set. I wonder how many other eight figure venture-fundable concepts could be exploited by lurking in the grocery store aisles with a label maker.
You don't quite understand what the deal with Soylent is.
You couldn't live on SlimFast if you had to. It's an appetite suppressant/meal replacement for short term use, given that it's not nutritionally balanced.
Neither is it similar to Ensure or most other meal replacement drinks for the same reasons. They're usually absolutely loaded with fast, low-index sugars that'll spike your blood sugar.
Basically, it's the food equivalent of water. Neutral, nutritious, has what your body needs and nothing more. The carb source they're using is high-GI, meaning it won't cause that spike. The idea being that when you CBA'd to cook, when you'd normally run to the local burger joint's drivethru, you shake up a glass of this stuff, and you're back to doing whatever you're doing for cheaper (about $3 a meal) and in less time.
Basically, it hits all of the right notes that most of the on-the-shelf competitors do not. It's relatively cheap, it keeps a long time, it's actually good for you, it's convenient as food could ever possibly be.
Sounds like you could probably survive entirely on Slim Fast. It's got Iron (which the original Soylent didn't have), Vitamin A, Vitamin C, Vitamin B, Vitamin D, and Iodine, and a bunch of other micronutrients. You probably wouldn't have a great time but I doubt you would on a Soylent-only diet either.
You overlooked the calories: 180 in Slimfast, 400 in Solyent. And that's just the premade drink. One pouch of the powder is a flat 2000, something I don't think Slimfast even has an answer for. Also, pay attention to the ingredient list: Milk, water, sugar, in that order.
Slimfast is a diet drink as the name implies, while Soylent is a meal replacement. If you wanted to get a reasonable (non-starvation) amount of calories from Slimfast to live on it and it alone, Soylent then wins on balance and cost.
You'd have to drink more slimfast, sure, but that challenges the assertion that you cannot survive entirely on SlimFast.
They also seem to have a protein shake drink http://d8m5oga7foiu.cloudfront.net/wp-content/uploads/2016/1... which seems similar but obviously lower in calories, better protein:carb ratio though. They also seem to sell some powder you can mix with milk, presumably you could put more than one scoop in.
Not saying Solyent doesn't work for you and I don't want to sound like I'm promoting Slimfast. It's just not the first or only meal replacement shake.
Shame you're being downvoted. You can find powdered meals or ready-to-go shakes with similar or better nutrient profiles than Soylent in most grocery stores .