What about military rations? Ensure? The stuff they feed the people doing hunger strike in Guantanamo? There's plenty of "prior art"
Not to mention the benefit for emergencies, foreign aid, the malnourished, the infirm, etc.
For work-at-homers:
1) Drink soylent for breakfast
2) Drink soylent at lunch, work through your normal lunch hour
3) Use the extra time and money you saved to eat a delicious dinner at your favorite restaurant
You could literally eat out nicely every day if you used your lunch money for it. When I'm working, it sucks to stop in the middle of it to make lunch. Instead of stopping my train of though, I can just sip on some soylent and keep going. Then unwind for dinner a bit earlier since I saved some time at lunch.
same.
?
EAT FOOD!!!