Soylent is probably overkill for this use case. As long as you eat a reasonable healthy real-food meal every day, all you really need from a meal replacement are some macronutrients and maybe electrolytes. I mean, you could drink yoghurt for breakfast every day and be fine.

Soylent is designed to completely replace food which is a much harder & much more expensive proposition than simply giving you some energy until dinnertime.