I found the article a bit odd in that it presented it as a new idea when there have been meal replacement drinks like boost on the market for years. Though it would be pretty interesting if it became something that you could easily do yourself in your own home.
This sort of thing is pretty common for medical reasons too. I was very ill when I was a teenager and didn't eat food for two years. Instead I had formula pumped into my stomach through a tube in my nose. In more extreme cases I've known people who have had what is called "total parenteral nutrition" - where nutrients are delivered directly into the bloodstream (bypassing digestion altogether).
*facepalm*
I don't know what products might be available in other countries, but in Australia these powdered meal replacement products have been on the market as weight loss supplements for years.
OptiFastManufactured by Nestlé Nutrition, OptiFast has been a low calorie diet program available through pharmacies for decades.
IngredientsIt's mostly milk protein with added vitamins, minerals and fats; basically the same thing as this guy is making, just pre-packaged into individual servings and available in a variety of flavors.
Cost: $50.00 for 21 servings -
SourceThe taste? I've tried them. Mostly a fake sweet flavor from the maltodextrin, with some saltiness from the amino acids and minerals. Not exactly a gourmet delight. Pro tip: if you're gonna try the bars, the chocolate is horrible. Cappuccino on the other hand is awesome. The effect from drinking one of the shakes is that you don't feel hungry for a few hours. Not full like you'd had a meal, just not hungry. Very unsatisfying if you enjoy your food.
So once Nestlé brought their product out, pretty much all the major players in the milk powder industries copied the idea and made their own products available with the same formulation.
OptiSlim: $55.00 for 42 servings -
SourceTony Ferguson: $3.29 per serving -
SourceXantrax: $21.99 for 14 servings -
SourceThis is old news folks. The only difference with this guy's Soylent is that it's manufactured in his kitchen instead of a food processing plant. If you wanna try what it's like, go to your local pharmacy, look for a meal replacement shake in their weight loss section and buy it. I guarantee you'll probably go off them in a few days. It's rare for anyone to tolerate nothing but a liquid diet for any extended length of time; eating real food is simply enjoyable in a way powdered meal replacements can't match.