> Right now what kind of whey protein, and which veggie shake mix?
Pretty much any of either that is on the market. Soylent isn't that remarkable, nor is there a well-understood narrow optimum (despite Soylent both pretending that there is and that it is always right at that point even with the major formula changes.)
> Do I need to buy a blender?
No, just a closed container for shaking will work tolerably well, or a blender bottle/cup (the ones with either an agitator ball or internal fixed plastic blades to help with shaking a powder) is even better.
there isn't a well understood optimum but it's easy to screw up and get a vitamin b12 deficiency for instance, or to put too much fiber or sulfur and constantly pass gas, etc.
Pretty much any of either that is on the market. Soylent isn't that remarkable, nor is there a well-understood narrow optimum (despite Soylent both pretending that there is and that it is always right at that point even with the major formula changes.)
> Do I need to buy a blender?
No, just a closed container for shaking will work tolerably well, or a blender bottle/cup (the ones with either an agitator ball or internal fixed plastic blades to help with shaking a powder) is even better.